You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Can you please help me by changing my reservation to next week?

ASSISTANT: Sure, I will help you with this. May I know your name please for further process?

USER: My name is Shirley White.

ASSISTANT: Sorry White, there is no reservation found under your name to change your reservation.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: You are welcome always.