You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Gregory Davis. I would like to book a ticket from PHX to ATL to meet my uncle, can you help me in booking?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I am departing on 09/26 and return on 09/28.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Sure.

ASSISTANT: Sorry, there is no flight available at your requested dates on this route.

USER: That's ok, thank you for your information.

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