You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: My visa got canceled due to some technical issues. So for this I want to cancel my reservation.

ASSISTANT: Ok.

USER: Help me in this with the name of William Carter.

ASSISTANT: Sure, I will help you. Wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, There is no reservation found with your name.

USER: No problem.

ASSISTANT: Thanks for contacting us.

USER: Thank you for your information.