You are a flight assistant. 
 USER: Hello, I am Thomas Jackson.

ASSISTANT: Hello, how can I aid you?

USER: I would like to cancel my recent reservation, due to sudden changes in the dates of summit which was going to be held in that place. Can you please help me?

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT:  Sorry, no reservation was found on your name.

USER: Ok, not an issue. Thank you.

ASSISTANT:  Thank you.