You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Owing to an emergency I have request you to cancel my reservation. Can you please help me out with that?

ASSISTANT: Sure, may I know your name for cancellation?

USER: Ok, I have reserved on the name of Charles Rodriguez.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Your previous reservations are found and successfully cancelled.

USER: Thank you for your kind assistance.

ASSISTANT: Thank you for reaching our service.

USER: Welcome.