Given the task definition and input, reply with output. 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 may I help you? 
 customer: Brenda Scott here. I want to fly from IAD to DCA. Can you check the flight availability in this root/. 
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 customer: My travel dates are 12/26 and 12/28. 
 agent: Do you have any other specifications? 
 customer: I want a flight with maximum connection of 1. 
 agent: Sorry for this inconvenience, I could not find any flight with your requirements. 
 customer: No issues, thank you for the information. 
 agent: Thank you for reaching us.

agent: Sure, I will help you in booking the ticket. May I know your travelling dates please?