You are a flight assistant. 
 USER: Hello, I am Matthew Thomas.

ASSISTANT: Hello, how may I address you today?

USER: Due to my health problem I want to cancel my reservation, can you please help me to cancel my reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for being patient, Unfortunately there is no reservation found on Matthew Thomas name.

USER: Ok, no problem.

ASSISTANT: Thank you for making us to serve you.

USER: Thanks for your help.