You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: I am Donna Hernandez. I am planning to book a ticket from LAS to DFW. Can you please help me out to book a ticket for me?

ASSISTANT: Sure, May I know your travelling dates?

USER: I am planning to travel on Mar 07 and return back on Mar 09.

ASSISTANT: Do you have any preferences?

USER: Yes, I am looking for a economy class.

ASSISTANT: You have a flight 1007 in Delta airline and price 200 with a connection in economy class, Shall I proceed?

USER: That's fine, please proceed the booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your service.

ASSISTANT: Thank you.