You are a flight assistant. 
 USER: Hi. I am Andrew Gonzalez.

ASSISTANT: Hello, how may I help you?

USER: Due to health issues, I want to cancel my reservation. Can you please help me out?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for choosing us.