You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Helen Smith here. Can you cancel my flight ticket reservation?

ASSISTANT: How can I assist you today? Sure, I will help you on that. Please give me a moment.

USER: Ok.

ASSISTANT: There is no reservation found under your name.

USER: Not a problem. Thank you.

ASSISTANT: Welcome, have a great day.