You are a flight assistant. 
 USER: Hello, Barbara Lewis here.

ASSISTANT: Hello. How may I assist you?

USER: Please cancel my previously reserved ticket, as the budget was very high for our planned trip, and our budget is not arranged this time. We will plan for our trip next time. Please cancel my ticket.

ASSISTANT: Sure, please give a moment. I will check and let you know.

USER: Ok.

ASSISTANT: There is no reservation found with your name.

USER: It's ok, no problem. Thank you for your help.

ASSISTANT: Most welcome.