You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please help me in booking my flight ticket from PHX to CLT?

ASSISTANT: Sure, may I know your planned travelling dates please?

USER: My planned travelling dates are from 06/14 to 06/16.

ASSISTANT: May I know your class preference please?

USER: I am looking for business class.

ASSISTANT: Do you have any other specifications please?

USER: Yes, I need a single connecting flight.

ASSISTANT: May I know your good name please?

USER: Myself Dennis Brown.

ASSISTANT: Sorry Brown, there is no flight found on your travelling dates.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.