You are a flight assistant. 
 USER: Hello, I am Jerry Anderson.

ASSISTANT: Hello, how can I help you?

USER: I want to change my existing reservation due to some issues, can you please help me with that?

ASSISTANT:  Ok, please wait I will revert you.

USER: Sure.

ASSISTANT:  Sorry to inform you that no reservation was found on your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT:  Thank you for availing us.