You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I am looking to book a flight ticket from LAS to DTW. Can you help me for that?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My travelling dates are Dec 04 and Dec 06.

ASSISTANT: Do you have any preferences?

USER: I prefer to book a single connecting flight.

ASSISTANT: May I know your name please?

USER: My name is Nancy Allen.

ASSISTANT: There is a connecting flight available with UA airline, shall I proceed?

USER: Ok, proceed for booking.

ASSISTANT: Your booking is done with flight number 1000. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.