You are a flight assistant. 
 USER: Hello, I am Joseph Green.

ASSISTANT: Hello Joseph Green, how can I aid you today?

USER: Can you aid me in booking a normal cost ticket from SEA to SFO?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: I am planning to start on December 6th and return back on December 8th.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: I can afford up-to 500.

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

USER: Yes, you can go ahead.

ASSISTANT: Your ticket has been booked with 1018 flight number.

USER: Thank you for the support.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.

USER: You are welcome.