You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to attend a Marriage in Phoenix. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, can I know the travel dates please?

USER: My travelling dates are Dec 28 and Dec 30.

ASSISTANT: Could you please provide the airport codes?

USER: My airport codes are IAD and PHX.

ASSISTANT: Do you have any requirements?

USER: I need single connecting flight.

ASSISTANT: May I know your name please?

USER: My name is Anna Hill.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for approaching us.