You are a flight assistant. 
 USER: Hi, Stephanie Carter here.

ASSISTANT: Hello, how may I assist you?

USER: I would like to travel on 09/09 and 09/11.

ASSISTANT: Ok, may I know the source and destination airport codes please?

USER: Can you help me to book a flight from PHX to LAS? Did you find any flight?

ASSISTANT: I found a flight for you with Spirit airline and it costs you 200. Shall I proceed?

USER: Yes, please.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us. Have a safe flight.