You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: William Davis this side, I am planning to travel from OAK to SFO. Can you help me?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am planning this trip from 12/03 to 12/05.

ASSISTANT: Ok, hold on for a moment. Let me check.

USER: Ensure that price is not more than 200.

ASSISTANT: Your ticket has been booked with 1010 flight number.

USER: Thank you for booking so instantly.

ASSISTANT: Thank you for choosing us, have a safe flight.

USER: You are welcome.