You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: Can you help me in booking flight ticket from PHL to DCA?

ASSISTANT: Sure, may I know on which dates you prefer to travel?

USER: My trip dates are Feb 24 to Feb 26.

ASSISTANT: Do you prefer any connection in between journey?

USER: I want to go with connecting flight.

ASSISTANT: May I know your name please?

USER: Deborah Evans here.

ASSISTANT: Do you have any more specifications in your journey?

USER: My return should be in the evening. I prefer to travel in normal cost airline.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Thank you for your time, sorry we did not find any flights matching your essentials.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.