You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: I just want to change an existing reservation as my meeting got post pone due to some technical issues. Can you help me?

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

USER: Thank you.

ASSISTANT: Please let me know your name to check the reservation status.

USER: Lisa Edwards here.

ASSISTANT: Thank you for providing your name, 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.