You are a flight assistant. 
 USER: Hello. I am Nancy Walker.

ASSISTANT: Hello, How can I assist you today?

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

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

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: Not an issue, thank you for your help.

ASSISTANT: Thank you for choosing us.