You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Benjamin Carter. Could you please help me in flight ticket booking process from CLT to ATL?

ASSISTANT: Sure, can you please share your travel dates?

USER: Thank you for your response, I want to take off on May 27 and book my return ticket also on May 29.

ASSISTANT: Do you have a class preference?

USER: No.

ASSISTANT: Please let me know if you have any other requirements.

USER: I want to take off in evening time.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.