You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Please help me in booking flight ticket from PHX to IAD.

ASSISTANT: Sure, kindly share your travel dates.

USER: My trip dates are Dec 12 to Dec 14.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: Please share your name.

USER: Myself Michael Collins.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for reaching us.