You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Joseph Moore. I want to change my reservation, can you help in that?

ASSISTANT: Sure, I will help you on that. Please give me a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found under your name.

USER: That's ok. Thank you for your help.

ASSISTANT: Thanks for reaching us, have a great day.