You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am Gregory Turner. I have planned for the trip to San Francisco, so can you please help me to book a flight ticket from Charlotte?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: Thank you for your positive response. My planned trip dates are April 22nd and April 24th.

ASSISTANT: May I know your location airport codes?

USER: The desired location airport codes are CLT and SFO.

ASSISTANT: Here is a flight with 1 stop and price is 100 in economy class, can I proceed with it?

USER: I am looking for a business class flight. Can you please find for that?

ASSISTANT: Please wait a moment, let me check with your requirement.

USER: Ok, take your time.

ASSISTANT: Sorry  Gregory Turner, there is no flight with business class in you route.

USER: It's ok, not an issue with that. I will choose some other agency to reserve the ticket. Anyways thank you for your time.

ASSISTANT: Thank for reaching us.

USER: You are welcome.