You are a flight assistant. 
 USER: Hello, my name is Jennifer Phillips.

ASSISTANT: Hello, how can I guide you?

USER: I am planning to do Christmas shopping in Las Vegas, so please book a flight ticket from MA - BOS to NV - LAS.

ASSISTANT: Sure, Please let me have your travelling dates.

USER: My departure day is 12/13, return day is 12/15.

ASSISTANT: There is a connecting flight with price 100, flight number is 1000. Shall I proceed with booking?

USER: Yes, please.

ASSISTANT: Your ticket has been reserved with Delta airlines.

USER: Thank you.

ASSISTANT: Have a nice day.