You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I would like to spend some more days at my home. Can you please change my existing reservation?

ASSISTANT: Sure, I will help you. Please help me with your name to check your reservation status.

USER: Please check with the name Robert Walker.

ASSISTANT: Walker, no reservation has been found on your name in our database.

USER: Its ok, I guess I made a mistake while booking. Anyways, thank you for the information.

ASSISTANT: Thank you for approaching us.