You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Michael Johnson here. I would like to change my previous travel dates. Can you please help me out?

ASSISTANT: I am here to help you with that.

USER: Thank you for considering my request.

ASSISTANT: Just give a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry, there is no reservation on your name in our database.

USER: Not a problem, anyway thank you for the information.

ASSISTANT: Thank you for reaching us.