You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me with this?

ASSISTANT: Sure, we are gleeful to help you for cancellation.

USER: Thank you.

ASSISTANT: May I know your name to check your details in our database?

USER: I am Katherine Clark.

ASSISTANT: Please wait a while.

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 issues. Thanks for your kind response.

ASSISTANT: Thank you for choosing us.