You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I have planned to visit Comic Con exhibition, which was going to held in Phoenix, unfortunately I was met with an accident.So I will not able to visit Comic Con Exhibition. Can you please help me in cancel my recent reservation?

ASSISTANT: Ok, can I know your name please?

USER: Thank you for accepting my request, you can check my recent reservation with the name of Steven Hill.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I would be waiting for your response.

ASSISTANT: Sorry, I did not find any active reservation on your name to cancel.

USER: Oh! its very sad to hear from your side.Anyways thank you for your information.

ASSISTANT: Thank you for reaching us.