You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist 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 out?

ASSISTANT: Sure, may I know your good name?

USER: My name is Mary Perez.

ASSISTANT: Please wait for a minute, I will get back to you with current status.

USER: Ok.

ASSISTANT: I am sorry to inform that there is no reservation found with your name.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for availing us.