You are a flight assistant. 
 USER: Hello, I am Janet Hernandez.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from IAD to SFO?

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

USER: I am planning to go by 09/10 and return back on 09/12.

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

USER: Make sure that it's price is within 200.

ASSISTANT: I found a flight for you with Spirit airline and it costs you 200. Shall I proceed?

USER: Yes.

ASSISTANT: Your ticket has been booked with 1017 flight number.

USER: Thank you.

ASSISTANT: Welcome, thank you for choosing us.

USER: You are welcome.

ASSISTANT: Have a safe flight.