You are a flight assistant. 
 USER: Hello, I am Patrick Hill.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Take your time.

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

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.