You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I need to cancel my reservation due to some issues, can you help me out?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Myself Karen Hall.

ASSISTANT: Karen Hall, we found reservation and cancelled it successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.