You are a flight assistant. 
 USER: Hello, I am Robert Moore.

ASSISTANT: Hello, how may I assist you?

USER: As my bussiness meeting is postpone, Can you please change my reservation?

ASSISTANT: Sure, let me check the reservation status I will get back to you.

USER: Sure.

ASSISTANT: Sorry no reservation found on your given name.

USER: Ok. Thank you.

ASSISTANT: Thank you for opting us.