You are a flight assistant. 
 USER: Hello, Nancy White here.

ASSISTANT: Hello. How may I assist you?

USER: I need to book a ticket from DEN to LAX, can you help me in doing that?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My trip dates are 01/15 to 01/17.

ASSISTANT: Do you have any specifications?

USER: Make sure that my return time should be afternoon.

ASSISTANT: JetBlue airlines is available in your route with the ticket fare of 200 and the return time is afternoon, shall I proceed with the booking?

USER: Please proceed.

ASSISTANT: Your ticket is booked with the flight-1005.

USER: Thank you.

ASSISTANT: Thank you for choosing us.