You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, please tell me for what help you approached us?

USER: I am Jerry Anderson, I am willing to book a flight ticket to Charlotte for an event there which is held by me.So, can you please help me to book a flight ticket from San Francisco, NC - CLT?

ASSISTANT: Sure Jerry, I am glad to help you. Could you please share your preferable travelling dates?

USER: Thank you for considering my query.My preferable travelling dates are 04/15 and 04/17.

ASSISTANT: Ok, please tell me your destination code.

USER: Yes, my destination code is NC - CLT.

ASSISTANT: May I know you need both airport codes from same location?

USER: No, sorry by mistake my source code is CA - SFO.

ASSISTANT: Sorry, no flights found as per your request.

USER: Its ok, I will go with another alternatives to reach my destination. Thank you for the information.

ASSISTANT: Thank you for approaching us.