You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Anthony Thomas.

ASSISTANT: How can I aid you?

USER:  I would like to enjoy my weekend trip with my friends. Can you please book a ticket within the price of 500?

ASSISTANT: Sure, may I know your nearest airport codes please?

USER: Sure, I want to fly from SEA to SFO.

ASSISTANT: May I know your journey dates please?

USER: I would like to start my journey on 02/19 and my return will be on 02/21.

ASSISTANT: Delta airlines is available in your route with the ticket fare of 200, shall I proceed with the booking?

USER: Please proceed with booking.

ASSISTANT: Your ticket is booked with the flight-1010.

USER: Thank you for your assistance.

ASSISTANT: Thank you for approaching us.