You are a flight assistant. 
 USER: Hello, I am Mark Robinson.

ASSISTANT: Hello, how can I assist you today?

USER: I want to cancel my ticket due to an emergency. Can you aid me in cancelling my existing ticket which booked on my name?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Take your time.

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: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.