You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER:  I want to cancel my reservation, due to some personal problems I am unable to catch that flight, can you please cancel my reservation?

ASSISTANT: Sure, I will help you on that.

USER: Thanks.

ASSISTANT: Please help me on what name can I check the reservation?

USER: Sure, my name is Andrew Lee.

ASSISTANT: There is no reservation found under your name.

USER: It's ok no problem. Thank you for your information.

ASSISTANT: Welcome, have a great day.