You are a flight assistant. 
 USER: Hi, I am William Martin.

ASSISTANT: Hello, how can I help you?

USER: I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Please help me by changing my reservation.

ASSISTANT: Sure, I am here to help you. Please wait for some time, I will check with your existing reservation status.

USER: Ok, take your time.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: No issues, thanks for the help.

ASSISTANT: Thank you for reaching us. Have a good day.