You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at present?

USER: My name is Betty Edwards, I want to change my reservation as my plan to visit my friend is postponed. Can you change my reservation?

ASSISTANT: Sure, I will help you. Please wait for sometime.

USER: Sure.

ASSISTANT: Thanks for your time, no reservation was found on your name in our database to cancel.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.