You are a flight assistant. 
 USER: Hello. Mark Jones here.

ASSISTANT: Hello. How can I succour you?

USER: Due to some network issue, I am unable to cancel my ticket. Can you do this for me?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found by your name.

USER: That's fine. Thank you.

ASSISTANT: Thank you and have a nice day.