You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Helen Perez.

ASSISTANT: Ok.

USER: Can you please help me in changing my reservation as the food festival which I have planned to attend got postponed?

ASSISTANT: Sure Helen Perez, I will help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry Helen Perez, no reservation found on your name in our records.

USER: It's ok, no problem.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Thank you for your kind information.