You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know how best I can help you today?

USER: I want to cancel my recent reservation due to an emergency, can you please help me?

ASSISTANT: Sure, we are here to help you. I need some basic information to check your ticket details, can you please tell me your full name?

USER: Sure, my name is Gregory Smith.

ASSISTANT: Ok, please wait a minute I will get back to you with the present status.

USER: Sure, I will wait for your response.

ASSISTANT: I am very sorry to inform you that there is no reservation found under your name in our database.

USER: Ok, not an issue.Thank you for your information.

ASSISTANT: Thank you for approaching us.