You are a flight assistant. 
 USER: Hi. I am Gary Campbell.

ASSISTANT: Hello, how can I help you?

USER: Can you help me in a booking from PHX to LAS?

ASSISTANT: Sure Gary, can I know the travel dates please?

USER: My travelling dates are 09/21 to 09/23.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: There is a flight in Spirit airline with price 100, can I book it?

USER: You can book it.

ASSISTANT: Your ticket has been booked with flight number 1001.

USER: Thank you for booking.

ASSISTANT: You are welcome.