You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to our UA travelling agency. How may I guide you?

USER: Mark Hernandez here, please cancel my recent reserved ticket, I am having other priorities on those dates.

ASSISTANT: Sure, please hold on for a moment.

USER: Ok.

ASSISTANT: Sorry Hernandez, there is no reservation found on your name to cancel any reservation.

USER: Ok, no issues, I will check with my mail again, anyway thank you for your support.

ASSISTANT: You are welcome.

USER: You are welcome.