You are a flight assistant. 
 USER: Hi. I am Alexander Adams.

ASSISTANT: Hello, how can I help you today?

USER: I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Can you please help me?

ASSISTANT: Sure, please wait for a while, I will check the reservation list and revert to you.

USER: Ok.

ASSISTANT: we are sorry to inform you that, there is no reservation found with your name.

USER: Fine, thanks for the information.

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