You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found with your name.

USER: Thank you for the information.

ASSISTANT: Thank you for reaching us.