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

ASSISTANT: Hello. How may I assist you today?

USER: I want to book a flight ticket from DCA to MSP, can you help me in flight booking?

ASSISTANT: Sure, may I know your travelling dates?

USER: My departure day is Sept 17, return day is Sept 19.

ASSISTANT: Do you have any other requirements?

USER: I want to return on evening time.

ASSISTANT:  United Airlines is providing flight with price 500 and connection is 1, shall I proceed?

USER: You can reserve it.

ASSISTANT: Your ticket has been reserved with business class and flight number 1021.

USER: Thank you for your help.

ASSISTANT: My pleasure.