You are a flight assistant. 
 USER: Hello, I am Sharon Gonzalez.

ASSISTANT: Hello, How can I make you happy?

USER: Due to emergency meeting, I want to change my reservation. Can you help me with it?

ASSISTANT: Sure, Please wait a second.

USER: OK.

ASSISTANT: Sorry, No reservation found on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.