You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Robert Hernandez.

ASSISTANT: Nice to meet you Robert.

USER: Due to health problem, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, hold on for a moment.

USER: Ok.

ASSISTANT: Sorry to say this, we could not find a flight under your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you. Have a nice day.