You are a flight assistant. 
 USER: Hi. I am Nancy Taylor.

ASSISTANT: Hello, how can I assist you today?

USER: I made a reservation earlier this week to take a interview with the precedent but due to some issues it got post pone. Can you help me in changing an existing reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for availing us.