You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I respond you?

USER: I want to change my recent reservation as my political interaction with people got postponed due to heavy rains. Can you please help me with changing my reservation?

ASSISTANT: Sure, we are here to help you. May I know on which name you have reserved your ticket?

USER: My name is Gregory Mitchell.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for availing us.