You are a flight assistant. 
 USER: Hello, I am Daniel White.

ASSISTANT: Hello, how can I be at your service today?

USER: I am planning to visit a Space Needle in Seattle, so please book a flight ticket within a price limit of 500.

ASSISTANT: Sure, may I know your preferable dates to travel?

USER: I would like to fly on 09/04, return on 09/06.

ASSISTANT: Ok, kindly share me the airport code of Seattle and your take off point.

USER: My source and destination airport codes are CA - SFO, WA - SEA.

ASSISTANT: Ok, let me check the availability of flights on your route.

USER: Ok.

ASSISTANT: Delta airline is available on your dates at a fare of 100 only in flight number 1002 with a halt. Shall I proceed with the booking?

USER: You can reserve it.

ASSISTANT: Your booking has been done on the name Daniel White.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.