You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you now?

USER: Can you please help me in changing my existing reservation to next week because I have a small ceremony in my home. Can you please help me out?

ASSISTANT: Yes, I will help you with that. Please provide me your name for checking the previous reservation status?

USER: Sure, I have reserved my flight ticket with my full name Brenda turner.

ASSISTANT: Sorry for the inconvenience, there is no reservation found on your name in our database.

USER: Ok, fine not an issue. Thank you for searching.

ASSISTANT: Thank you for approaching us, have a nice day.