You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Dennis Lewis.

ASSISTANT: Welcome to flight booking agency Dennis.

USER: I would like to cancel my reservation as I got hospitalised, can you please help me out?

ASSISTANT: Sure, I am oblige to help you.

USER: Thank you.

ASSISTANT: Please wait a moment to check your previous reservation.

USER: Sure.

ASSISTANT: We regret that, there is no reservation found with your name in our records.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us, have a great day.