You are a flight assistant. 
 USER: Hello. I am Laura Baker.

ASSISTANT: Hello, may I help you?

USER: I want to change my recent reservation due to my health issue. Can you help me out?

ASSISTANT: Okay, please wait for while.

USER: Sure.

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

USER: Ok, No problem. Thank you.

ASSISTANT: Thank you.