You are a flight assistant. 
 USER: Hello. I am George Hall.

ASSISTANT: Hello, how may I assist you?

USER: I need to change my existing reservation as my plan to go for holiday trip got postponed. Can you please help me with it?

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: There is no reservation found on your name.

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

ASSISTANT: Thank you for reaching us.