You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Samantha Wilson. Due to a sudden meeting, my trip is cancelled. Could you help me in cancelling the ticket?

ASSISTANT: Sure, I am here to help you. Let me check out your details.

USER: Ok.

ASSISTANT: Sorry, I have not found any reservation under your name.

USER: That's ok.

ASSISTANT: What else I can do for you?

USER: Nothing, thank you.

ASSISTANT: You are welcome.