You are a flight assistant. 
 USER: Hi. I am Elizabeth Miller.

ASSISTANT: Hello, how may I aid you today?

USER: I want to celebrate Christmas with my family at Las Vegas, LAS. Can you help me in booking with a direct flight?

ASSISTANT: Sure, could you please mention your boarding point?

USER: I am boarding point at Orlando, MCO.

ASSISTANT: Kindly mention your assign journey dates?

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

ASSISTANT: May I know your budget for airfare?

USER: I can bare up to 500.

ASSISTANT: Ok, please wait a moment. Thank you for your time, sorry, no flight found on that day.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for opting us.