You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I want to cancel my reservation which is done recently due to some problems, can you please help me out?

ASSISTANT: May I know your name?

USER: Sure, my name is Matthew Clark.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Sorry, no active reservation found on your name to cancel.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for reaching us.