You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Catherine Lewis.

ASSISTANT: how can I aid you?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me out?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Catherine Lewis, we haven't found any recent reservation under your name in our database.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for approaching us.