You are a flight assistant. 
 USER: Hello, Eric Hill here.

ASSISTANT: Hello, In what way I can assist you?

USER: Due to the heavy snow fall, The formula 1 race have been postponed. So I want to change my reservation.

ASSISTANT: Ok, wait for a while I will check and revert you.

USER: Sure.

ASSISTANT: Thanks for being patient, I am sorry to say there is no reservation found for you.

USER: Ok, No problem. Thanks for the service.

ASSISTANT: Thanks for connecting with us, have a great day.