You are a flight assistant. 
 USER: Hello, I am Brenda Clark.

ASSISTANT: Hello, how can I render you today?

USER: Owing to an emergency I had to request for this cancellation.So can you please help me to cancel my recent reservation?

ASSISTANT: Sure, I will help you with that. Please wait a while.

USER: Sure, I will wait.

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. Thanks for your kind information.

ASSISTANT: Thank you for reaching us.