You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a ticket to Philadelphia, PHL to attend Board meeting.

ASSISTANT: Sure, can you please mention with your dates of travel?

USER: My travelling dates are Feb 11 and Feb 13.

ASSISTANT: May I know your source airport code please?

USER: My source is Washington, DCA.

ASSISTANT: Can you please share me with your class preference?

USER: I am comfortable with any class.

ASSISTANT: I found a flight with the connecting flight of fare 100 with Southwest airline, shall I book this ticket?

USER: Ok, please confirm.

ASSISTANT: May I know your name please for booking purpose?

USER: Sure, I am Deborah Martin.

ASSISTANT: Ok Martin, your booking is done with the flight number 1005.

USER: Ok, Thank you.

ASSISTANT: You are welcome, have a pleasant journey.