You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Could you help me in booking a flight ticket from CLT to OAK?

ASSISTANT: Sure, I am here to help you. Can you please share your preferable travelling details ?

USER: I want to fly on Feb 20, return on Feb 22.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your airline preference?

USER: I am comfortable with any airline.

ASSISTANT: In which class do you prefer to travel?

USER: I am comfortable with any class.

ASSISTANT: May I know your departure and arrival time?

USER: My return time should be afternoon.

ASSISTANT: Ok, please wait for a moment. Let me check for the flight availability in this route and get back to you with the best flight.

USER: Sure.

ASSISTANT: There is a flight from United Airlines with a ticket fare 100, which departs at 14:00 and returns at 15:00. Shall I proceed with booking?

USER: Ok, proceed to booking.

ASSISTANT: Your ticket has been confirmed with the flight-1003 in economy class.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Richard Moore.

ASSISTANT: Welcome, have a safe trip.