You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your name?

USER: I am Amy Clark.

ASSISTANT: Sure, wait a minute.

USER: Ok.

ASSISTANT: Sorry, there was no reservation found on your name.

USER: That's ok, thank you for searching.

ASSISTANT: Thank you for reaching us.