You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to travel from IAH to DCA to explore global culture. Can you reserve me a flight ticket?

ASSISTANT: Sure, I am here to help you. May I know your planned dates of journey?

USER: I am planning to travel on Nov 15 and again return on Nov 17.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: IS there any connection limit preference?

USER: I prefer a flight having maximum connection of one.

ASSISTANT: Do you have any class preference?

USER: I don't have any other preferences.

ASSISTANT: Could you help me with your name please?

USER: I am Susan Baker.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: Susan Baker, sorry there are no flights found on this route for the given dates.

USER: It's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching our agency.