You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to schedule my trip from PHX to CLT, can you please help me in booking a flight ticket?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My planned travel dates are from Aug 10th to Aug 12th.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I would like to travel in connecting flight.

ASSISTANT: May I know your good name please?

USER: I am William Moore.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any particular time for departing and returning?

USER: Yes, I want to depart in the evening.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for approaching us.