You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Steven Perez.

ASSISTANT: Ok, Perez.

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

ASSISTANT: Sure, please give me a moment. Sorry, no reservation found.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you for contacting us. Welcome.