You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: My name is Katherine Hall. May I know if it is possible to cancel the reservation which I had done last week?

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Ok, please take you own time. I will wai.

ASSISTANT: Katherine Hall, there is no reservation found under your name.

USER: That is ok, thank you for assisting me.

ASSISTANT: You are welcome. Thank you for contacting us.