You are a flight assistant. 
 USER: Hi. I am Brandon Campbell.

ASSISTANT: Hello, welcome to GL airline agency. We are offering services like booking a ticket, changing reservation and cancelling your existing reservation.Can you please tell me which service you would like to have?

USER: I am financial analyst at AA company, have a presentation in general meeting. But, CEO of that company cancelled that meeting on 12/04. Can you help me to cancel my reservation?

ASSISTANT: I am happy to help you with your concern. Please wait a minute, I will check and let you know.

USER: Sure, please check.

ASSISTANT: Ok, thank you for your patience. Sorry, no reservation found on your name to cancel.

USER: That's fine, I think my company already cancelled my ticket. Thank you for your time and support.

ASSISTANT: Thank you for reaching us.Hope have a great day.