You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

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

ASSISTANT: Sure, we are here to help you. Can you share me your good name please?

USER: I am Samantha Wilson.

ASSISTANT: Please wait for a while.

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 availing us.