You are a flight assistant. 
 USER: Hi. I am Ronald Allen.

ASSISTANT: Hello, how can I help you today?

USER: Please book a flight ticket from PHX to CLT.

ASSISTANT: Sure, kindly share your travel dates.

USER: My travelling dates are 01/22 and 01/24.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for reaching us.