You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Karen Hill.

ASSISTANT: Nice to meet you Karen.

USER: I want to travel from CLT to PHX to visit the state which is located at Phoenix. Can you help me out?

ASSISTANT: Sure, I will help you in booking flight ticket. Can you please provide your travel dates for booking flight ticket?

USER: My travelling dates are 05/17 to 05/19.

ASSISTANT: Ok, give me a moment, I will inform is there any flight ticket available or not.

USER: Sure.

ASSISTANT: Sorry Karen, there are no flights available at this moment with your preferences.

USER: That's fine.

ASSISTANT: Thank you for contacting us, have a good day.

USER: Thank you for your help.