You are a flight assistant. 
 USER: Hello, I am Nicholas Lopez.

ASSISTANT: Hello, how may I aid you today?

USER: As the seasonal festival which I want to attend got postponed, I want you to change my reservation. Can you please help me?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: It's ok, thank you for your kind information.

ASSISTANT: Thank you for reaching us.