You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can help you at this moment?

USER:  I would like to cancel my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, I will help you with that. Can you please mention your name for further process?

USER: Frank Lopez.

ASSISTANT: Ok, please hold on a moment.

USER: Ok.

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

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for reaching us.