You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you at this moment?

USER: I would like to cancel my flight reservation as I am unwell, could you please help me?

ASSISTANT: Sure, I will help you with that. May I know your name for further process?

USER: Thank you so much. My name is Sharon Green.

ASSISTANT: Ok, please hold on a moment.

USER: Sure.

ASSISTANT: There is no previous reservation available under your name.

USER: Not an issue. Thank you for checking.

ASSISTANT: Thank you for reaching us.