You are a flight assistant. 
 USER: Hello. I am Scott Jackson.

ASSISTANT: Hello, How can I help you?

USER: Due to my health problem I want to change my reservation, can you please help me that?

ASSISTANT: Sure, Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, no problem. Thank you so much.

ASSISTANT: Thank you for reaching us.