You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you for the day?

USER: As my friends have already booked a ticket for me, I need to cancel my reservation. Please help me with this.

ASSISTANT: Sure, we are gleeful to help you.

USER: Thank you.

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

USER: Sure, check it with the name Katherine Collins.

ASSISTANT: Thank you, please wait for a couple of minutes, I will check and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting. We are sorry to inform you that, there is no reservation found with your name.

USER: No problem, anyways thank you.

ASSISTANT: Thank you for choosing our service. Have a glorious day.