You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you at this moment?

USER: Here Christine White. I want to reserve a flight ticket from DFW to DEN. Can you help me in booking?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My preferable dates are 08/25 and 08/27.

ASSISTANT: Sure, I will help you. Please wait for a moment.

USER: Sure, take your own time.

ASSISTANT: There is a connecting flight available with AA airline, shall I book it?

USER: That's fine, proceed with booking.

ASSISTANT: Your booking is done with flight number 1008. Happy journey.

USER: Thanks for helping me in booking a flight ticket.

ASSISTANT: You are welcome, have a nice day.