You are a flight assistant. 
 USER: Hello, I am Nancy Mitchell.

ASSISTANT: Hello. How can I aid 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. Please, wait for a while.

USER: Take your time.

ASSISTANT: Sorry, there is no reservation found on your name in our records.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for opting us.