You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Eric Lopez. I have a plan to meet my friend in Charlotte, can you please help me in booking a flight ticket from PHX to CLT? My trip dates are from 12/31 till 01/02.

ASSISTANT: Sure, I will help you to book a flight. Please give me a moment.

USER: Ok, take your time.

ASSISTANT: Thank you for your patience. Sorry, no flights are available on your route.

USER: That's ok, thank you fro checking.

ASSISTANT: Welcome, have a nice day.