You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you for today?

USER: I want to cancel my reservation, due to some problems I am unable to travel those dates so can you please cancel my reservation?

ASSISTANT: Ok, can I know your name for checking your reservation?

USER: Sure, my name is Lisa Allen.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Oh! May be I am not booked my ticket properly at that time. Thank you for your service.

ASSISTANT: Thank you for consulting us.