You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to change my reservation due to my health issues, can you please help me with this?

ASSISTANT: Sure, may I know your name?

USER: My name is Stephen White.

ASSISTANT: Please wait a second.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for availing us.