You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I best serve you today?

USER: Owing to an emergency I had to request for this cancel reservation.

ASSISTANT: Sure, please share your good name.

USER: My name is Melissa Collins.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no active reservation found with the given name.

USER: Thank you.

ASSISTANT: Thank you for opting us.