You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Joseph Allen.

ASSISTANT: Glad to meet you Allen.

USER: I am planning to travel from DFW to LAS.

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

USER: My travelling dates are 11/27 to 11/29.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Ok.

ASSISTANT: I found a flight for you with UA airline and it costs you 200. Shall I proceed?

USER: Proceed for booking.

ASSISTANT: Your ticket has been booked with 1006 flight number.

USER: Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.