You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I abet you?

USER: My name is Melissa Edwards. I want to book a flight ticket on 07/11 for attending my sister's marriage in Seattle.

ASSISTANT: Sure, may I know when would you like to return?

USER: I will return on 07/13.

ASSISTANT: How much can you afford for the ticket?

USER: I can afford up to 1000.

ASSISTANT: Kindly share your airport codes.

USER: My source is San Francisco, CA - SFO, destination airport code is WA - SEA.

ASSISTANT: Ok, there is an Southwest airline with flight number 1013 and price of 100 available on your route. Shall I proceed?

USER: Yes, please.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for opting us.