You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to cancel my reservation due to sudden change in my trip, can you assist me?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: Catherine White.

ASSISTANT: Thank you. Please wait for a while, let me check your reservation status in our database.

USER: Sure.

ASSISTANT: Sorry, no reservation found under your name in our database.

USER: No problem, thank you for searching.

ASSISTANT: You are most welcome.