You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am looking for a flight from DFW to CLT, can you help me in booking?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, my planned travel dates are Jan 27 and Jan 29.

ASSISTANT: Please share me your name.

USER: Myself Gregory Brown.

ASSISTANT: Do you have any specifications?

USER: I prefer for an economy class.

ASSISTANT: We found a economy class flight with United Airline, flight number: 1011. Shall I book this ticket?

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

ASSISTANT: Your ticket has been reserved.

USER: Thank you for the service.

ASSISTANT: Thank you.