You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am David Wilson.

ASSISTANT: How can I aid you today?

USER: Can you please help me in cancelling my recent reservation?

ASSISTANT: Sure, I will help you with that. Please wait a moment.

USER: Thank you. I will wait.

ASSISTANT: I have found your reservation and cancelled successfully.

USER: Thank you.

ASSISTANT: Thank you for reaching us.