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 problems I am unable to travel those dates, can you please cancel my reservation?

ASSISTANT: Sure, may I know your name to check for the previous reservation?

USER: Sure, my name is Paul Perez.

ASSISTANT: Let me check for the previous reservation.

USER: Ok.

ASSISTANT: Paul, there is no reservation found under your name.

USER: Oh! It's ok no problem may be I am not booked my ticket properly at that time. Thank you for your service.

ASSISTANT: Thank you for contacting us.