You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Actually, I want to cancel my reservation which is done recently due to some problems, can you please help me?

ASSISTANT: Sure, please help me with your name to check your details.

USER: Sure, my name is Katherine Jones.

ASSISTANT: Sorry, no reservation found on your name.

USER: Ok, no problem. Anyways, thank you for your service.

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