You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mark Allen.

ASSISTANT: Can you tell me how may I assist you?

USER: I need to cancel my reservation, can you help me out please?

ASSISTANT: Sure, I am glad to assist you with the ticket cancellation process.

USER: Thank you.

ASSISTANT: Please wait a minute. I will check your ticket status and let you know.

USER: Sure.

ASSISTANT: I am really sorry to inform you, there is no reservation found with your name to cancel.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: You are most welcome, thank you for contacting us.