You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what kind of help are you seeking from us?

USER: I want to change my existing reservation due to my health issue, so can you help me with this?

ASSISTANT: Sure, may I know your name?

USER: My name is Amanda White.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry, there is no reservation found on your name to change.

USER: Not a problem, thank you for checking.

ASSISTANT: Thank you for reaching us.