You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you please book a flight ticket from ORD to LAS?

ASSISTANT: Sure. Can I have your journey dates?

USER: My travelling dates are from July 15 to July 17.

ASSISTANT: May I know your name?

USER: My name is Anna Mitchell.

ASSISTANT: Let me know your connection limit.

USER: Sure, I prefer a flight with maximum of 1 connection.

ASSISTANT: Do you have any other requirements?

USER: I want to return in evening time.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a flight available with fare 200 and single connection in United Airline which will depart at 4:00 hours and return at 21:00 hours. Shall I confirm it?

USER: Ok, proceed.

ASSISTANT: Your ticket has been confirmed in economy class with flight number 1003.

USER: Thank you.

ASSISTANT: Thank you for choosing us.