You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I render you at this moment?

USER: Can you please help me in booking a flight ticket from CLT to PHL?

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

USER: Sure, I would like to go on Sept 23rd and return back on Sept 25th.

ASSISTANT: Ok, do you need a lay by in between the journey?

USER: Make sure it is a single connecting flight.

ASSISTANT: May I know your good name please?

USER: Myself Emily Smith.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure, take your time. But make sure it is in the business class.

ASSISTANT: There are no flights found on your requested dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.