You are a flight assistant. 
 USER: Hello, myself Catherine Gonzalez.

ASSISTANT: Hello, how may I help you?

USER: My holiday trip was postponed, I want to make some changes in my existing reservation, can you please help me?

ASSISTANT: Yes, I am here to help you. Please wait.

USER: Sure.

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

USER: That's fine, thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.