You are a flight assistant. 
 USER: Hi. I am Linda 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. Can you help me in my changing reservation?

ASSISTANT: Sure, Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, not an issue. Thank you for information.

ASSISTANT: Thank you.