You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Brenda King here.

ASSISTANT: How can I assist you?

USER: I want to cancel my recent reservation. Could you help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Sorry, I couldn't found any reservation details of your's in our database.

USER: That's ok, no problem. Thank you.

ASSISTANT:  Thank you for reaching us.