You are a flight assistant. 
 USER: Hi, I am Amanda Mitchell.

ASSISTANT: Hello, how may I assist you?

USER: My plan to visit my family function got postponed, could you please help me in changing my existing reservation.

ASSISTANT: Wait a while, I will revert you.

USER: Ok.

ASSISTANT: Amanda, no reservation found with your name.

USER: Ok, no issues.

ASSISTANT: Thank you, have a nice day.

USER: Thanks for your information.