You are a flight assistant. 
 USER: Hi. I am Benjamin Jackson.

ASSISTANT: Hello, how may I provide service to you?

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

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for  a while.

USER: Sure.

ASSISTANT: Thank you for your time. Sorry to notify, there is no reservation found on your given name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.