You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, kindly share your travel dates.

USER: Sure, my travelling dates are Sept 21 and Sept 23.

ASSISTANT: Do you have any connection limit?

USER:    Yes, I need a connecting flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: Please share your name.

USER: My name is Matthew Anderson.

ASSISTANT: There is a flight with your requirement, airline is United Airlines with price 100 and single connection. Shall I proceed with booking?

USER: Yes, please proceed with booking.

ASSISTANT: Your booking is done and flight number is 1002 in economy class.

USER: Thank you for the help.

ASSISTANT: Thanks for reaching us.