You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

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

ASSISTANT: How may I help you?

USER: Ok.

ASSISTANT: Sure, can I know your name?

USER: Sure, my name is Timothy Johnson.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you for reaching us.