You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you?

USER: I am Robert Brown. I want to change my reservation as my plan to meet my share holder is postponed. Can you help me with that?

ASSISTANT: Sure, please be on hold.

USER: Ok.

ASSISTANT: Thank you for your time, there is no active reservation found in your name.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for reaching us.