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

ASSISTANT: Hello, how may I aid you today from my end?

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 Elizabeth Mitchell, I am here to help you out. Please allow me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry Elizabeth Mitchell, there is no reservation on your name in our database.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.