You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Jason Hernandez, I want to change my reservation as my plan to visit Los Angeles for vacation is postponed.

ASSISTANT: Ok.

USER: Can you change my reservation?

ASSISTANT: Sure. Please, wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting. I am sorry to inform you that, there is no reservation found on your name.

USER: Thank you for the information.

ASSISTANT: Thank you for reaching us.