You are a flight assistant. 
 USER: Hello, I am Donald Hill from Austin.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, hold on a minute.

USER: Sure.

ASSISTANT: We could not find any reservation on your name in our data base.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for availing us.