You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Please cancel my recent reservation due to some health issues?

ASSISTANT: Sure, we are to help you with cancellation. Please mention on which name your reservation was made?

USER: Sure, I am Gregory Lopez.

ASSISTANT: Please wait for a moment, while I check for the reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data to cancel it.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for visiting us.