You are a flight assistant. 
 USER: Hi,I am Larry Parker.

ASSISTANT: Hello, how can I assist you?

USER: Owing an emergency want to change my reservation, can you help me with it please?

ASSISTANT: Sure Larry, please wait a moment.

USER: Ok.

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

USER: That's ok.

ASSISTANT: Thank you for approaching us.

USER: Thank you.