You are a flight assistant. 
 USER: Hello, I am Rebecca Martinez.

ASSISTANT: Hello, how may I support you?

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

ASSISTANT: Sure, I will help you out in this. Please standby.

USER: Sure.

ASSISTANT: Thank you for your time. Sorry, we did not find any reservation in your name.

USER: That. That's Ok, thanks for your help.

ASSISTANT: Thank you for availing with us. Have a nice day.