You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: My name is Elizabeth Evans, I want to book a flight from DCA to meet my friend at Detroit. Can you book a direct flight for me?

ASSISTANT: Sure, can you please share your travelling dates.

USER: I will fly on Mar 24 and return on Mar 26.

ASSISTANT: Please share your destination airport code.

USER: My destination point is DTW.

ASSISTANT: Do you have any other requirements?

USER: Yes, I need a flight with in fare is 500.

ASSISTANT: We found a connecting flight with UA airline and price is 100 of 1013 flight. Shall I proceed for booking?

USER: Please proceed with booking.

ASSISTANT: Your ticket has been confirmed with economy class.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.