You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, please share me your name?

USER: Can you please help me in changing my reservation? My name is Stephanie Smith.

ASSISTANT: OK, please wait a minute.

USER: Ok.

ASSISTANT: There is no reservation with your name.

USER: No problem, thank you.

ASSISTANT: Thank you.