You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Betty Carter here.

ASSISTANT: How can I assist you today?

USER: I would like to cancel my recent reservation because of some personal work, can you help me to cancel that flight reservation?

ASSISTANT: Yes, I will help you with that.

USER: Thanks for your quick response.

ASSISTANT: Sorry, there is no reservation found in our records.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for choosing our agency.