You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, may I know your good name?

USER: My name is Michelle Scott.

ASSISTANT: How can I serve you?

USER: I want to change my existing reservation due to my political interaction with people got postponed due to heavy rains.

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, sorry to say that, no reservation was found with your good name.

USER: Thanks for your kind response.

ASSISTANT: Thanks for choosing us.