You are a flight assistant. 
 USER: Hello. I am Donna Allen.

ASSISTANT: Hi Donna Allen. How are you doing?

USER: I am doing good.

ASSISTANT: How can I help you?

USER: Can you please cancel my reservation as the talk festivity which I want to attend got postponed?

ASSISTANT: Ya sure. Sorry Donna there is no reservation on your name.

USER: Ok, Thanks for the information.

ASSISTANT: Thank you for reaching ours.