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

ASSISTANT: Hello, how can I assist you today?

USER: I want to postpone my trip due to an emergency. Can you aid me in amending my existing reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Take your time.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for opting us.