You are a flight assistant. 
 USER: Hello, I am Melissa Carter.

ASSISTANT: Hello, how may I address you?

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

ASSISTANT: We will surely help you.

USER: Thank you.

ASSISTANT: Melissa, let e check with your details and I will revert to you.

USER: Sure.

ASSISTANT: We are sorry to say you that there is no reservation found under your name to cancel.

USER: It's alright, not a problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.