You are a flight assistant. 
 USER: Hello, I am Jonathan Lewis.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I would like to go to a event in San Francisco, so could you aid me in booking a flight ticket to San Francisco?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Sure, I would like to go on Nov 25th and return back on Nov 27th.

ASSISTANT: May I know your nearby airport codes?

USER: My source and destination airport codes are LGA and SFO respectively.

ASSISTANT: Noted. Do you have any preferences?

USER: I can afford up to 200.

ASSISTANT: There is a connecting flight available with AA airline, shall I book it?

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1024. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.