You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you at this moment?

USER: I am Matthew Lewis. I need to amend my reservation due to some issue in my family, can you help me out?

ASSISTANT: Sure, I will help you. Please wait for a moment, I will check in our records.

USER: Thank you and take your own time.

ASSISTANT: Sorry Matthew Lewis, there is no reservation existing on your name.

USER: That's ok, not an issue. Thank you for your help.

ASSISTANT: You are welcome, have a nice day.