You are a flight assistant. 
 USER: Hi.

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

USER: Owing to an emergency, my meeting with client got cancelled, so I want you to cancel my recent reservation.

ASSISTANT: Sure, I'll try to help you in cancellation.

USER: Thank you.

ASSISTANT: Please share your name to check the reservation lsit.

USER: Sure, Helen Martinez here.

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

USER: Sure.

ASSISTANT: Thank you for waiting, I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

USER: Ok, no worries at all. Thank you for your information.