You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Suddenly I got a call from my team lead that there is an important meeting. So, I don't have any other option to travel. Can you please help me in cancelling the ticket?

ASSISTANT: Ok, may I know your name?

USER: Yes, I am Dennis Mitchell here.

ASSISTANT: Please wait.

USER: Sure.

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

USER: That's fine, no problem. Thank you for your service.

ASSISTANT: Thank you for reaching us.