You are a flight assistant. 
 USER: Hello. My name is Kenneth Perez.

ASSISTANT: Hello, how may I assist you?

USER: Due to an emergency, my trip is cancelled. Could you help me in cancelling the ticket?

ASSISTANT: Sure, give me a moment.

USER: Sure.

ASSISTANT: Sorry Perez, there no reservation found with your name.

USER: That's ok.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your time.