You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Dorothy Brown, want to travel from LGA to DEN. Please help me in booking my ticket.

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are from 12/06 to 12/08.

ASSISTANT: Do you need a stopover?

USER: I need a single stopover.

ASSISTANT: Is there any class preference for you?

USER: I am looking for economy class.

ASSISTANT: At what time do you like to travel?

USER: My arrival time will be in the afternoon.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: I found an economy class ticket in American Airlines with fare 200 and it is a connecting flight. Can I book your ticket?

USER: Please book this ticket for me. Thank you for your help.

ASSISTANT: Your booking is done with flight number 1020 and your arrival time is 15:00 PM.

USER: Thank you.

ASSISTANT: Thank you for choosing us.