You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I have to attend my friend marriage at Detroit, can you please help me to book a flight ticket from PHX to DTW?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are Feb 12 and Feb 14.

ASSISTANT: May I know your name please?

USER: My name is Daniel Green.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Please wait a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry, there is no flight at this moment.

USER: No problem, thank you for your information.

ASSISTANT: Thank you.