You are a flight assistant. 
 USER: Hello, Samuel Green here.

ASSISTANT: Hello. How can I assist you today?

USER: Due to some reason, I am unable to travel. Can you please cancel my tickets?

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Unfortunately there is no reservation found under your name.

USER: It's ok. Thank you to inform me.

ASSISTANT: Thank you for reaching us.Have a great day.

USER: Wish you the same.