You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a flight ticket form PHL to IAD. Could you help me in booking?

ASSISTANT: Sure, I will help you. Can I have your planned travel dates please?

USER: My travelling dates are from Jan 31 - Feb 02.

ASSISTANT: Can I have your name please?

USER: Matthew Moore.

ASSISTANT: Do you need a connecting flight?

USER: I prefer for connecting flight.

ASSISTANT: May I know your other specifications?

USER: No.

ASSISTANT: Matthew Moore, no flights has been found on your planned travel dates.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.