You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I provide assistance to you?

USER: Please cancel my recent reservation owing to an emergency.

ASSISTANT: Please wait for a while, let me check your current status of reservation and revert to you.

USER: Ok.

ASSISTANT: To cancel your ticket, may I have your name please?

USER: I am Dennis Miller.

ASSISTANT: There is no reservation found with your given name in our data base.

USER: Thank you.

ASSISTANT: Thank you for availing us.