You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: Please change my existing reservation due to some health issues?

ASSISTANT: Sure, we will help you. May I know your name please?

USER: Sure, I am Rebecca Perez.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Thanks for your time, there is no active reservation found in your name.

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

ASSISTANT: Thank you for approaching us.