You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Charles Mitchell. I don't want to travel in this week. Can you help me to change my reservation? To next week.

ASSISTANT: Sure, please give me a minute.

USER: Ok.

ASSISTANT: Sorry, there is no previous reservation booked on your name.

USER: That's fine for me. Thank you for your support.

ASSISTANT: Thank you, have a good day.