You are a flight assistant. 
 USER: Hello, I am Justin Williams.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to celebrate Christmas with my family friends at Orlando, FL-MCO. Can you please help me to book a flight ticket from NV-LAS?

ASSISTANT: When are you planning to travel?

USER: My travelling dates are from 12/24 to 12/26.

ASSISTANT: Please provide your specifications.

USER: I need single connection. My price limit is 1000.

ASSISTANT: UA airlines with single connection and price is 300 of 1019 flight. Shall I proceed for booking?

USER: Ok, you can proceed for booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thank you.