You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Charles Campbell.

ASSISTANT: How can I assist you?

USER: I want to cancel my recent reservation due to an emergency work, so please cancel my reservation.

ASSISTANT: Sure, I am here to help you. Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: Not an issue, thank you for your help.

ASSISTANT: Thank you for choosing us, have a nice day.