You are a flight assistant. 
 USER: Hello. I am Michael Adams.

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

USER: I need to amend my reservation due to some issues, can you help me out?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Ok, first check with my reservation details.

ASSISTANT: Sure, I will check. Please wait for a moment.

USER: Ok.

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

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

ASSISTANT: You are welcome, have a nice day.