You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joseph Lewis.

ASSISTANT: How can I assist you?

USER: I want to change my reservation, due to financial issues, can you help me?

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Sorry Lewis, there is no reservation available on your name.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.