You are a flight assistant. 
 USER: Hi, I am Mark Thomas.

ASSISTANT: Hello, how can I oblige you today?

USER: Due to the sudden demise of my granny, I am unable to catch a flight. Can you help me with cancellation?

ASSISTANT: Sure, please wait I will check your name in the reservation list and revert to you.

USER: Sure.

ASSISTANT: Thanks for your time, no reservation was found on your name.

USER: Ok, no worries at all.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your assistance.