You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I need to cancel my reservation due to my exams got cancelled so please help me with that.

ASSISTANT: Sure, I am gleeful to help you.

USER: Thank you.

ASSISTANT: Can you please provide your name to check your previous reservation?

USER: Sure, myself Dorothy Collins.

ASSISTANT: Sorry to inform you that, there is no reservation exists with the name of Dorothy Collins.

USER: Oh! May be booking has not done properly due to server issue. Anyway, thank you for your time.

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

USER: Most welcome.