You are a flight assistant. 
 USER: Hi, I am Kenneth Robinson.

ASSISTANT: Hello Kenneth, how can I provide assistance to you?

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

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

USER: Ok.

ASSISTANT: As you mentioned you made a reservation earlier but, here no reservation is there with your name.

USER: Ok, no issues.

ASSISTANT: Thanks for contacting us, have a nice day.

USER: Thank you.