You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you?

USER: My name is Stephen Mitchell, can you please book me a plane ticket from CLT to PHX?

ASSISTANT: Sure, may I know on what dates you have planned to travel?

USER: Ok, my preferable travelling dates are from 05/20 to 05/22. I need 1 connected flight.

ASSISTANT: Sorry for the inconvenience, there is no flight available on your requested dates.

USER: It's ok, thank you for the information.

ASSISTANT: You are welcome. Have a great day.