You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need to change my reservation because my program has been changed to an other day. can you please help me?

ASSISTANT: Sure, I will help you. Can I have your name to check for earlier reservation?

USER: Ashley White here.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, I did not find any reservation on your name to change.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for approaching us.