You are a flight assistant. 
 USER: Hello, I am Justin Walker.

ASSISTANT: Hello, how can I assist you today?

USER: Due to some health issue, I want to cancel my recent reservation.

ASSISTANT: Ok, please wait for a moment, I will check and get back to you.

USER: Sure, I will wait.

ASSISTANT: Sorry, there was no reservation found with your good name.

USER: Ok, Thank you for providing information.

ASSISTANT: Thank you for opting us.