You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Matthew Lopez.

ASSISTANT: How can I assist you today?

USER: I would like to cancel my reservation as I am having my brothers marriage, can you please help me out?

ASSISTANT: Sure, I will help you on that. Please give me a moment for checking the reservation.

USER: Ok.

ASSISTANT: Thank you for waiting. Your reservation is cancelled successfully.

USER: Ok, thank you for your valuable services.

ASSISTANT: Welcome, have a great day.