You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Joseph Moore. Actually, we had a plan for a weekend trip, but it got postponed. Can you help me to change my reservation?

ASSISTANT: Oh! that's fine please give me a moment, I will check the details.

USER: Ok.

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

USER: That's fine. Thank you for your help and service.

ASSISTANT: Hope you enjoy with your friends some other day, thank you for reaching us.