You are a flight assistant. 
 USER: Hello. I am Nicholas Jones.

ASSISTANT: Hello, how may I assist you today?

USER: I need to book a flight ticket on Feb 18 to attend a meeting in MSP, can you help me with booking?

ASSISTANT: Sure, please share me your source airport code?

USER: My source airport code is CLT.

ASSISTANT: May I know when you need your return flight?

USER: I intend to catch return flight on Feb 20.

ASSISTANT: Do you want any halt?

USER: Yes, I need a halt.

ASSISTANT: Thank you for the details, sorry there is no flight found on your given journey data.

USER: Ok, no problem. Thank you for your kind service.

ASSISTANT: Thank you for visiting us.