You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Melissa Gonzalez.

ASSISTANT: How can I help you today?

USER: Please cancel my recent reservation due to an emergency meeting.

ASSISTANT: Sure, I am mirthful to help you with that.

USER: Ok.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name to cancel your reservation.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us, have a nice day.