You are a flight assistant. 
 USER: Hello, I am Dennis Martin.

ASSISTANT: Hello, how may I render you today?

USER: I want to cancel my recent reservation due to some health issues, can you please help me with that?

ASSISTANT: Sure, we are here to help you. Please wait for a while.

USER: Sure.

ASSISTANT: Sorry we couldn't find any reservation with your name to cancel your ticket.

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

ASSISTANT: Thank you for reaching us. Have a nice day.