You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER:  I made a reservation earlier this week to give a seminar, but my seminar has been postponed. This is the reason, help me to change the reservation with the name of Laura Martinez.

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Not a issue. Thank you for your quick response.

ASSISTANT: Thank you for opting us.