You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is William Lewis, can you help me to cancel the reservation which I had done last week?

ASSISTANT: Sure, wait a minute.

USER: Ok, I will wait.

ASSISTANT: Sorry, there was no reservation found on your name.

USER: That is ok, thank you for assisting me with the information of my reservation.

ASSISTANT: Thank you for choosing us.