You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Timothy Anderson, I want to book a flight to CA-SFO airport to visit my friend. Can you help me to book a flight under fare of 1000?

ASSISTANT: Sure, may I know your travel dates?

USER: I will fly on 10/18 and return on 10/20.

ASSISTANT: May I know your origin airport code?

USER: My source point is NY-LGA.

ASSISTANT: Timothy, we found a flight on your details with airline Frontier, flight number: 1003. Shall I book this ticket?

USER: Please proceed with booking,.

ASSISTANT: Your ticket has been booked.

USER: Thank you for helping me.

ASSISTANT: Thank you.