You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Sure, can I have your name please?

USER: I am Betty Smith.

ASSISTANT: There is no reservation found with your name.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you.