You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Debra Hernandez. I want to book a flight ticket from PHX to CLT. Could you help me in booking?

ASSISTANT: Sure Debra, can you please share me with your dates of travel?

USER: My preferable dates are from Aug,29 to Aug,31.

ASSISTANT: Please wait for a moment to check for the availability.

USER: Please check with the direct flight.

ASSISTANT: Sure, I will check it.

USER: Ok.

ASSISTANT: Sorry Debra, there is no flight found as per your travelling details.

USER: That's ok, no problem. Thank you for helping me.

ASSISTANT: You are welcome.