You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid 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 in changing my reservation?

ASSISTANT: Sure, I'll try to help you with this.

USER: Thank you.

ASSISTANT: Please share your name to check the reservation list.

USER: Jessica Rodriguez.

ASSISTANT: Give me some time.

USER: Ok.

ASSISTANT: Thank you for waiting, I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: No issue, Thank you for the information.

ASSISTANT: Thank you for availing us.