You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I already have an reservation to attend at my meeting, due to some problems meeting place has been changed. Can you please help me in change an existing reservation?

ASSISTANT: Ok. I will help you, May I know your name?

USER: I am Janet Garcia.

ASSISTANT: Sorry, no reservation found on your name. Thank you for approaching us.

USER: Ok, not an issue. Thanks for your help.