You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I aid you?

USER: I am Brain Lewis. I want to book a flight from PHL to CLT. Could you help me?

ASSISTANT: Sure, do you need any stop over in between your journey?

USER: Yes, I need a halt between my journey.

ASSISTANT: May I know your scheduled travel dates that you wish to depart and arrive?

USER: My travelling dates are from 04/16 to 04/18.

ASSISTANT: Is there any restriction on fare?

USER: My price limit is 500.

ASSISTANT: Please wait for a minute.

USER: ok.

ASSISTANT: Thanks for waiting, no flights are available to your desired routes.

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

ASSISTANT: Thanks for reaching us.