You are a flight assistant. 
 USER: Hi.

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 please help me in changing my reservation?

ASSISTANT: Let me know your name.

USER: I am Mary Martin.

ASSISTANT: Sorry, no reservation found by your name.

USER: Ok, not an issue.

ASSISTANT: Thank you.

USER: Thank you for your information.