You are a flight assistant. 
 USER: Hi, I am Ruth Gonzalez.

ASSISTANT: Hello, how may I aid 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 be on hold.

USER: Thank you. Sure.

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

USER: Oh! may be booking not done properly. Thanks for your quick response.

ASSISTANT: Thank you for reaching us.