You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Catherine White here.

ASSISTANT: How may I guide you today?

USER: Can you cancel my flight ticket reservation?

ASSISTANT: Sure, I will help you with that. Please wait for a minute.

USER: Ok.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for contacting us.