You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I am Nicole Mitchell, I would like to travel from LAS to IAD. Can you please help me to book my flight ticket?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: Sure, I want to depart on Dec 6th and I also want you to book my return ticket in the evening on Dec 8th.

ASSISTANT: Ok, do you have any requirements?

USER: I prefer for a business class.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Make sure that the flight is with single connection.

ASSISTANT: I found a flight for you with American Airlines and it costs you 700. Shall I proceed to reserve a seat in this single connecting flight?

USER: Happy to hear that. Please book the ticket for me.

ASSISTANT: Your ticket has been booked with 1003 flight number.

USER: Thank you so much.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.