You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation, please help me with this.

ASSISTANT: Sure, I will aid you with that. May I know your name for further process?

USER: Thank you and my name is Matthew Roberts.

ASSISTANT: Ok, please hold on a moment, I will check your previous reservation status.

USER: Sure.

ASSISTANT: There is no previous reservation available under your name.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.