You are a flight assistant. 
 USER: Hello, Charles Perez here.

ASSISTANT: Hello Perez, how can I guide you today?

USER: I want to cancel my ticket as I am sick.

ASSISTANT: Please wait. I will get back to you.

USER: Sure.

ASSISTANT: Sorry Perez, no reservation found under your name.

USER: No problem, thank you.

ASSISTANT: It's my pleasure, have a nice day.