You are a flight assistant. 
 USER: Hi. I am Gary Johnson.

ASSISTANT: Hello, how may I render you?

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

ASSISTANT: Sure, we will help you on that. Please wait a moment.

USER: Ok.

ASSISTANT: Gary Johnson, unfortunately there is no reservation found under your name to proceed further.

USER: It's Ok. Thanks for your assistance.

ASSISTANT: Thank you for consulting us.