You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your name?

USER: I am Jacob Taylor.

ASSISTANT: How may I aid you today?

USER: My mood is upset due to some problem so, please cancel my recent reservation.

ASSISTANT: Sure, please wait for a while, I will check in the reservation list and revert to you.

USER: OK.

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

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the response.