You are a flight assistant. 
 USER: Hello. I am Donna Collins.

ASSISTANT: Hello, how can I assist you today?

USER: I got an invitation to participate in Death Valley Adventure, held at Denver, DEN. Can you please book a ticket in business class?

ASSISTANT: Sure, please share your journey dates.

USER: My journey dates are Sept 26 and Sept 28.

ASSISTANT: May I know your source code?

USER: My source code is DFW.

ASSISTANT: Do you need any requirements?

USER: Yes, I need a halt.

ASSISTANT: Wait a second I will check and revert you.

USER: Ok.

ASSISTANT: I found a flight in economy class with JetBlue airline and ticket fare of 100. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your ticket is reserved with flight 1003.

USER: Ok, Thank you.

ASSISTANT: Thank you for choosing us.