You are a flight assistant. 
 USER: Hello. Eric Lopez here.

ASSISTANT: Hello, how can I help you today?

USER: I just want to change my existing reservation which I have done earlier, due to some health issues. Can you you please help me with it?

ASSISTANT: Sure, please wait for a moment.

USER: Ok, sure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Anyways, thank you.