You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I render you today?

USER: I am Helen Lewis. I want to participate in the multi-car 50 mile canyon road test drive, which is going to be held at Denver. Can you book me a ticket within the range 200?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: I need to leave from my nearest airport SFO to reach DEN.

ASSISTANT: Could you please let me know when you are willing to travel?

USER: I want to travel on 04/11, and need to catch return flight on 04/13.

ASSISTANT: Do you need a break in between the journey?

USER: Yes, I need a halt.

ASSISTANT: Thank you for providing your details, please wait for a moment.

USER: Sure.

ASSISTANT: An airline Hawaiian with flight number 1028 is matching with your specifications. Price 200 and a single connection is available.

USER: Proceed with the booking.

ASSISTANT: Your booking has been processed.

USER: Thanks for the help.

ASSISTANT: Thank you for opting us.