You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I would like to book a ticket from IAH to DCA, please help me with it.

ASSISTANT: Sure, kindly mention your travel dates?

USER: My travelling dates are from 10/24 to 10/26.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flight found with your requirement.

USER: Fine, thanks for your response.

ASSISTANT: May I know your name?

USER: I am Nancy Walker.

ASSISTANT: Thanks for reaching us, have a good day.