You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I assist you?

USER: I am Justin Carter. Due to some emergency work, I need to cancel my reservation. Can you please help me?

ASSISTANT: Sure, I am here to help you. Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no seat reserved for you in any flight.

USER: No problem. Thank you.

ASSISTANT: Thank you for choosing us.