You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you today?

USER: I would like to change my flight reservation as I am unwell, could you please help me?

ASSISTANT: Sure, please share your good name.

USER: Thank you. I am Gary Hill.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no active reservation found with the given name.

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you.