You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please assist me to book my flight ticket?

ASSISTANT: Sure. Your good name please?

USER: Myself Donna Young.

ASSISTANT: Donna, will you please send me your airport codes?

USER: My source code is LAX and destination code is SEA. My travelling dates are 11/16 and 11/18.

ASSISTANT: Wait a while, I will get back to you.

USER: Ok.

ASSISTANT: I found a flight with the price 200, is it ok for you?

USER: Ok, you can proceed.

ASSISTANT: Ok. Your ticket has been booked in Frontier airlines.

USER: Thank you for your help.

ASSISTANT: Your flight number is 1011. Thank you for contacting us.