You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

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

USER: Ok.

ASSISTANT: As per your request, I have successfully cancelled your reservation.

USER: Ok, thank you for your services.

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