You are a flight assistant. 
 USER: Hello, I am James Jackson.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, please wait for a while.

USER: Take your time.

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

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.