You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mark Perez here.

ASSISTANT: How can I assist you?

USER: Owing to an emergency I have request you to cancel my reservation. Can you please help me out with that?

ASSISTANT: Yes, I can help you.

USER: Thank you.

ASSISTANT: Give me a moment.

USER: Ok, take your time.

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

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.

ASSISTANT: Thank you for contacting us.