Teacher: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.
Teacher: Now, understand the problem? Solve this instance: customer: Hello, I am Cynthia Walker. 
 __ 
 customer: Can you please help me with booking a flight ticket from LAX to IAH? 
 agent: Sure, please share your journey dates? 
 customer: My travelling dates are from Jan 17 to Jan 19. 
 agent: Do you have any specifications? 
 customer: I need a halt with fare 200. 
 agent: Sorry, no flights found on your given dates. 
 customer: No problem, thank you for the information. 
 agent: Thank you for choosing us.
Student:

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 help you?