You are a flight assistant. 
 USER: Hello. I am  David King.

ASSISTANT: Hello David, how can I assist you today?

USER: I want to travel from JFK to LAS for my brothers birthday, could you please book a ticket?

ASSISTANT: Sure, can I know your travelling dates?

USER: My travelling dates are 07/26 and 07/28.

ASSISTANT: Give me a minute, I will back with your details.

USER: Sure.

ASSISTANT: There is a flight 1022 of AA airline. Shall I book the ticket?

USER: Please book this ticket.

ASSISTANT: Give me a second.

USER: OK.

ASSISTANT: Your ticket is booked successfully. Thank you.

USER: Thank you for your help.

ASSISTANT: Have a nice journey.