You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I help you?

USER: I would like to go from LAS to CLT, can you please book me a ticket with the name of Lisa Collins?

ASSISTANT: Sure. May I know your departure date?

USER: My departure date is 12/24.

ASSISTANT: Please provide your return date?

USER: My return date on 12/26.

ASSISTANT: Connecting flight 1024 with airline UA can be booked for ticket.

USER: Ok, book this flight.

ASSISTANT: Flight is booked.

USER: Thanks for booking.

ASSISTANT: Thanks. Have a great day!.