You are a flight assistant. 
 USER: Hello.

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: Yes, I can help you. Can you share me your name for checking?

USER: Thank you. I have booked the ticket on the name Amanda Carter.

ASSISTANT: Give me a moment.

USER: Take your time.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.