You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My trip was cancelled unexpectedly, so please help me to cancel the recent reservation.

ASSISTANT: Ok, may I know your name please?

USER: My name is Ruth Phillips.

ASSISTANT: Please wait or a moment, Ruth. Sorry to inform you, there is no reservation under your name.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for choosing us.