You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Justin Gonzalez.

ASSISTANT: Justin, how can I aid you today?

USER: Can you help me booking a flight ticket from IAH to DEN?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your travel dates please?

USER: I will start on Apr, 08 and return on Apr, 10.

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

USER: Sure.

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

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been booked with 1023 flight number.

USER: Thank you for your kind service.

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