You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Due to my mother health condition I want to change my reservation which I have done it before to attend my college event. Can you assist me about it?

ASSISTANT: Let me check your details. Sorry, there is no reservation basing your details.

USER: Oh! it's ok.

ASSISTANT: May I know your name please?

USER: Myself Deborah Collins.

ASSISTANT: Thank you for reaching us Deborah.

USER: Most welcome.