You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brandon Smith.

ASSISTANT: How can I help you?

USER: I am planning to book a ticket to attend a meeting at LAS. Can you please help me out to book a ticket for me?

ASSISTANT: May I know your source airport code please?

USER: My source airport code is PZ-PHX.

ASSISTANT: Please provide me your journey dates.

USER: I would like to travel on 07/02 and return back on 07/04.

ASSISTANT: I found a flight in UA airlines available with price 100. Shall I book the ticket for you?

USER: Please proceed the booking.

ASSISTANT: Your ticket is confirmed and the flight number is 1022.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us, have a good day.