You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to change my reservation as my plan to meet my uncle is postponed. Can you help me with that?

ASSISTANT: Sure, can I know your name?

USER: My name is Ronald Robinson.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation found on your given name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.