You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Due to some urgent client meeting, I am willing to cancelling the reservation. Can you please help me for this?

ASSISTANT: Sure, I will help you with that. May I know your name for further process?

USER: Myself William Baker.

ASSISTANT: Ok, please hold on a moment.

USER: Sure, I will wait for your response.

ASSISTANT: There is no previous reservation available under your name.

USER: Not a big deal, anyway thank you very much for your service.

ASSISTANT: Thank you for reaching us.