You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to change my reservation, because I have another important meetings on those dates, can you please change my reservation?

ASSISTANT: Sure, please wait for a moment to check your details. Meanwhile, may I know your name?

USER: Sure, my name is Justin Wright.

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

USER: Oh! It's ok no problem. Thank you for your information.

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