You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Matthew King, can you help me to change my reservation to next week?

ASSISTANT: Yes, I will help you about it. Please, wait a moment to check the reservation status.

USER: Sure.

ASSISTANT: Sorry King, there is no reservation found under your name in our listing.

USER: That is fine. Thank you for your help.

ASSISTANT: Most welcome. Hope you have a great day.