You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Melissa Green.

ASSISTANT: How can I aid you at this moment?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me in this?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please hold on a moment, I will check your previous reservation status.

USER: Sure.

ASSISTANT: There is no previous reservation available under your name.

USER: Not an issue, thank you.

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