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.

customer: Hello. 
 agent: Hello. How can I help you? 
 customer: Please book a flight ticket from ORD to DFW. 
 __ 
 customer: My planned travel dates are Jan, 18 and Jan, 20. 
 agent: May I know your connection limit please? 
 customer: I would prefer single connection. 
 agent: Do you have any specifications? 
 customer: No, thanks. 
 agent: There is a flight with single connection in frontier airlines, can I proceed for booking in 1011 flight? 
 customer: Please proceed. 
 agent: On which name can I proceed for booking? 
 customer: Jerry Hill. 
 agent: Your booking is done in economy class. 
 customer: Thank you.

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: Your travelling dates please?