You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Melissa Brown.

ASSISTANT: Which service are you looking for?

USER: Due to an emergency meeting, I want to cancel my reservation. Can you help me with it?

ASSISTANT: Sure, I will help you with that.

USER: OK.

ASSISTANT: Please wait, Let me check your reservation status.

USER: OK.

ASSISTANT: Thanks for waiting. Sorry Melissa Brown, No active reservation found on your name to cancel it.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for choosing us.