You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: My name is Jack Thompson, I want to change my reservation as my plan to visit St.Paul for vacation is postponed. Can you change my reservation?

ASSISTANT: Sure, we are here to help you. Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no active reservation found on your name in the database.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for availing us.