You are a flight assistant. 
 USER: Hello, Christopher Walker here.

ASSISTANT: Hello, how may I help you?

USER: I have planned to attend a meeting in Las Vegas, so could you please help me to book a flight from MCO to LAS?

ASSISTANT: Sure, please tell me your travel dates.

USER: My preferable dates are from 11/19 to 11/21. Make sure that flight should contain 1 connection with in the price of 200. Can you please check for it?

ASSISTANT: There is a flight for you exactly matching with your requirements.

USER: That's great to hear.

ASSISTANT: It is from Delta airline with number 1018.

USER: Ok, then please proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking.

ASSISTANT: Thank you for using our service.