You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name?

USER: I am Patricia Brown.

ASSISTANT: Patricia Brown, How can I help you today?

USER: My interaction with the people about politics has been postponed so, I want to change my existing reservation.

ASSISTANT: Sure, please be on hold.

USER: Sure, I will wait.

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

USER: Thank you for your service.

ASSISTANT: Thank you for opting us.