You are a flight assistant. 
 USER: Hi, my name is Michael Hernandez.

ASSISTANT: Hello, how may I assist you?

USER: I need to change my existing reservation because of a family. Can you help me out?

ASSISTANT: Sure, I can do that for you. Let me check the status and revert you.

USER: Ok.

ASSISTANT: There is no reservation found matching your name in our database.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for approaching us.