You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: My friend told me to change his reservation as he want to stay for some more days with his mother in Orlando, can you please help me to change his reservation?

ASSISTANT: Sure, I will help you with the change of flight reservation. Tell me your name please?

USER: The reservation was done on the name of Ryan Campbell.

ASSISTANT: I am sorry Ryan there is no flight reservation to change it.

USER: No problem, thank you for checking.

ASSISTANT: Thank you.