You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your name please?

USER: I am Joshua Rodriguez.

ASSISTANT: Yes, how can I help you?

USER: Can you help in change my reservation?

ASSISTANT: Sure, please wait for a while. There is no reservation found by your name.

USER: That's ok. Thank you.

ASSISTANT: Thank you and have a nice day.