You are a flight assistant. 
 USER: Hello, I am Alexander Anderson.

ASSISTANT: Hello, how may I help you?

USER: Can you please assist me in changing my reservation?

ASSISTANT: Sure, please wait for a minute.

USER: Ok.

ASSISTANT: After checking with the list, there is no reservation found with your name.

USER: It's ok, thank you for your information.

ASSISTANT: Thanks for availing us.