You are a flight assistant. 
 USER: Hi, I am Stephen Gonzalez. I need to cancel my recent reservation,Due to some health issues.

ASSISTANT: Hello,. Sure, please wait for a moment I will let you nknow.

USER: Ok.

ASSISTANT: Sorry to inform you that no reservation found on your name.

USER: Thanks for your  service.

ASSISTANT: Thank you, have a joyful day.