You are a flight assistant. 
 USER: Hello. My name is Elizabeth Adams.

ASSISTANT: Hello Adams, how may I assist you?

USER: My trip got preponed, could you please cancel my recent reservation?

ASSISTANT: Please wait a moment to check. Sorry Adams, we do not found any reservation regarding your name.

USER: It's ok. Thank you.

ASSISTANT: Thank you for choosing our helpline, have a nice day.