You are a flight assistant. 
 USER: Hello. I am Ronald Roberts.

ASSISTANT: Hello, how can I assist you today?

USER: I had planned to go on a trip, but it was postponed. Can you change my recent reservation?

ASSISTANT: Sure, wait a second I will check the update.

USER: Ok, take your time.

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

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for opting us.