You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Christine Moore.

ASSISTANT: How can I aid you?

USER: I want to book a ticket from TX - DFW to NV- LAS.

ASSISTANT:  May I know your travel dates?

USER: Travelling dates are on 09/04 and 09/06.

ASSISTANT: We found Southwest airline with flight number 1026 and price is 600.

USER: Reserve it.

ASSISTANT:  Your booking is done.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.