You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am willing to change my reservation as I have some work at Office, so please help me to change.

ASSISTANT: Sure, we are here to assist you. Please mention your name to proceed further.

USER: Sure, I am Elizabeth Robinson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not find any reservation on your given name.

USER: No issues, thank you.

ASSISTANT: Thank you for approaching us.