You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Myself Samantha Nelson. I want to cancel my flight ticket due to some problems I am unable to travel in flight so can please cancel my flight ticket?

ASSISTANT: Ok, please wait.

USER: Ok, thank you for your positive response.

ASSISTANT: Sorry, no reservation found on your name to cancel.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Ok, most welcome.