You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be a help for you?

USER: I am David Parker, want to travel from DFW to LAX. Please help me in booking my ticket.

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My travelling dates are from 04/19 to 04/21.

ASSISTANT: There is a flight available from AA airline which matches with your requirement, can I proceed to book it?

USER: Yes, please proceed with the booking.

ASSISTANT: Your ticket is booked with flight 1005.

USER: Thank you for your help.

ASSISTANT: You are welcome.