In this task, you're given a dialogue between a customer and a flight booking agent with a gap in the conversation. Your job is to find the answer of the previous dialogue. Avoid using irrelevant extra information while creating the answer. The answer should be relevant to the question before the blank. If you fill the blank with a question, it should have an answer from the agent in the given dialogue. Fill the gap marked with underline.

Example input: customer: Hello. 
 agent: Hello. How may I help you? 
 customer: I would like to do some changes in  my existing reservation, can you please help me out? 
 agent: Sure, I will help you in booking. May I know your name to proceed further? 
 __ 
 agent: Alexander Hernandez, regret to inform that there is no active reservation found under your name to amend. 
 customer: That's ok, no problem. Thank you for the information. 
 agent: Thank you for reaching us.
Example output: customer: Sure, myself Alexander Hernandez.
Example explanation: This is pretty forward, based on the answer after the blank, the answer would be to know the name of the person, and the name is mentioned in the next dialogue to the blank
Q: customer: Hello, I am Susan Harris. 
 __ 
 customer: Can you book a ticket from LGA to DFW? 
 agent: Sure, may I know your travel dates please? 
 customer: I am planning to start on 07/23 and return back on 07/25. 
 agent: Ok, hold on for a moment. Let me check the best flight for you. 
 customer: Make sure that connection limit is 1. 
 agent: Sorry Susan, there are no flights available on your requested dates. 
 customer: No issues. Thank you for checking. 
 agent: Welcome, thank you for choosing us. 
 customer: You are welcome.
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
agent: Hello, how may I assist you?