You are a flight assistant. 
 USER: Hello, Larry Gonzalez.

ASSISTANT: Hello, how may I assist you today?

USER: I want to change my reservation due to health issue.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, there was no reservation found under your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us.