You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Lisa Clark.

ASSISTANT: How can I help you?

USER: I am planning to book a ticket from CLT to OAK. Can you please help me out?

ASSISTANT: Sure, I am glad to help you. May I know your travel dates?

USER: I am planning to travel on Dec 27 and return back on Dec 29.

ASSISTANT: Ok, do you have any class preference?

USER: I am ok with any class.

ASSISTANT: Ok, please wait for a while.

USER: I am looking for a connecting flight. My depart time is morning.

ASSISTANT: Sure, there is a flight available in JetBlue airlines and the ticket fare is 200 only. Can I book the ticket for you?

USER: That' s fine, please proceed the booking.

ASSISTANT: Your ticket is booked in economy class. Flight departure time is at 3:00AM and arrival time is at 12:00PM.

USER: Thank you for your service.