You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Andrew Evans here. I need your help in changing my reservation due to some health issues. Can you please help me with that?

ASSISTANT: Sure, please hold on for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, I did not find reservation on the given name.

USER: That's ok, no problem. Anyway thank you for the information.

ASSISTANT: Thank you for reaching us.