You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I amend you?

USER: I am planning to surprise my sister on her birthday at Las Vegas, can you help me with booking?

ASSISTANT: Sure, may I know when are you planning to travel?

USER: My trip dates are 08/01 and 08/03.

ASSISTANT: How much fare are you expecting?

USER: I can pay up to 500.

ASSISTANT: Kindly share your airport codes.

USER: I will fly from OAK to LAS.

ASSISTANT: Ok, there is an Southwest airline with flight number 1020 is going on your way and fare is 200. Shall I proceed?

USER: Please, procced.

ASSISTANT: May I know your name?

USER: I am Gregory Phillips.

ASSISTANT: Your booking has been done with the name you provided.

USER: Thank you.

ASSISTANT: Thank you for opting us.