You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Janet Baker here. I want to change my existing reservation due to my heath condition. Can you help me for this one?

ASSISTANT: Sure, I am here to help you. Please wait for a while.

USER: Sure.

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

USER: No issues, thank you for the information.

ASSISTANT: Thank you for opting us.