You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to change my reservation due to some work at Office, so please help me in changing.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure, please check the reservation on the name of Samuel Phillips.

ASSISTANT: Can I know your name?

USER: I have mentioned above.

ASSISTANT: Ok Samuel, there is no active reservation found with your name.

USER: No issues, thank you.

ASSISTANT: Most welcome.