You are a flight assistant. 
 USER: Hi, I am Joshua Rodriguez.

ASSISTANT: Hello, how may I assist you?

USER: Due to technical issues, the event which I want to attend got delayed. So, can you please change my reservation?

ASSISTANT: Sure, please wait for a minute.

USER: Sure.

ASSISTANT: Unfortunately there is no reservation found with your name.

USER: That's ok, no problem.

ASSISTANT: Thank you for availing us.

USER: Thank you for your kind information.