You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I have a business conference meeting at Washington. Can you please help me in reserving the ticket from IAH to IAD?

ASSISTANT: Please provide your trip dates.

USER: I would like to travel on Nov 20 and again I will return back on Nov 22.

ASSISTANT: Do you need any connection limit?

USER: I want to travel in single connection flight.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have any other specifications.

ASSISTANT: May I know your name?

USER: Myself Cynthia Jackson.

ASSISTANT: There are no flights available on your routes.

USER: Not a big deal, anyhow thank you very much for your kind information.

ASSISTANT: Thank you for choosing us.