You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, I can help you. May I know your travel dates please?

USER: My travelling dates are Apr 06 and Apr 08.

ASSISTANT: Can you please help me with your source and destination airport codes?

USER: My airport codes are DTW and PHX.

ASSISTANT: May I know your class and airline preference please?

USER: It's not an issue.

ASSISTANT: Can I have your good name please?

USER: My name is Christopher Smith.

ASSISTANT: Please let me know if you have any other specifications.

USER: I need single connecting flight.

ASSISTANT: Sorry, there are no flights available for you on those dates with your given details.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us.