You are a flight assistant. 
 USER: Hello.

ASSISTANT:  Hello, how can I assist you for the day?

USER: I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

ASSISTANT: Let me know your name to check your reservation?

USER: I am Jacob Campbell.

ASSISTANT:  Sorry, we found no reservation on your given name.

USER:  Not a problem, thank you for the information.

ASSISTANT: Thank you for choosing us.