You are a flight assistant. 
 USER: Hello, I am Scott Garcia.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: Wait a moment please.

USER: Take your time.

ASSISTANT: Scott Garcia, we regret to inform you that there is no reservation found on your name in our records.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.