You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Larry Thomas.

ASSISTANT: How may I guide you?

USER: The event which I am planning to attend has been postponed. Can you please change my reservation to some other dates?

ASSISTANT: Sure, I will help you. Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Larry, no reservation has been found on your name in our database.

USER: It's ok, I guess there is a problem at your end. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.