You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am planning to change my reservation to next week, can you help me out with that?

ASSISTANT: Sure, I will help you to change your reservation.

USER: Thank you.

ASSISTANT: Ok, please provide me your name to search your previous reservation.

USER: My name is Nicholas Jones.

ASSISTANT: Sorry, no reservation found on your name to change your reservation.

USER: No issues, thank you for your time.

ASSISTANT: Welcome, have a nice day.