You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you help to change an existing reservation?

ASSISTANT: Sure, I will help you. Please may I know your name?

USER: I am George Scott. Because when I reserved previously that time some information was wrong. Please check once.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: There is no reservation on your name in our database.

USER: Thanks for your checking.

ASSISTANT: Thanks for reaching us.