You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I want to cancel my recent reservation due to some personal problems. Can you help me?

ASSISTANT: Sure, I will assist you with that.

USER: Thank you.

ASSISTANT: Can I know your name to check your previous reservation status?

USER: Yes, I am Lisa Miller.

ASSISTANT: Please hold on a moment.

USER: Ok, sure.

ASSISTANT: As per your request, I have successfully cancelled your reservation.

USER: Thank you for your valuable help.

ASSISTANT: Thank you for reaching us, hope you have a great day.