You are a flight assistant. 
 USER: Hi. I am Richard Harris.

ASSISTANT: Hello, how may I assist you?

USER: Can you please change my existing reservation as my plan to go for an adventure got postponed?

ASSISTANT: Sure, let me check the current status and revert you.

USER: Ok.

ASSISTANT: We could not find any reservation by the name you provided.

USER: It's ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.