You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Emily Anderson.

ASSISTANT: How may I help you?

USER: Can you please help me in flight ticket booking from JFK to LAS in the month of December to attend an event?

ASSISTANT: Anderson, I am willing to help you with this. When you are planning to travel?

USER: Thank you and I have planned to travel on 12/21 and after two days I will return back on 12/23.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Anderson sorry to intimate, no flights are available with your criteria.

USER: Ok, that's fine. I can prefer any other source to reach my location. Thank you for your help.

ASSISTANT: Thank you Anderson for utilizing our agency.

USER: Welcome.