You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patricia Collins.

ASSISTANT: What service that you are looking from our agency Collins?

USER: I want to cancel my flight ticket, due to some problems I am unable to travel so can you please help me with that?

ASSISTANT: Sure, I am gleeful to help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to check your previous reservation.

USER: Ok.

ASSISTANT: We regret to inform you that, there in no reservation on your name in our records.

USER: Oh! It's ok no problem.

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

USER: Thank you for your service.

ASSISTANT: Welcome.