You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I need to cancel my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Sure, may I know your name to check for the previous reservation?

USER: Thank you for considering my request.

ASSISTANT: Please allow me a moment.

USER: Myself Sandra Taylor.

ASSISTANT: Thank you for providing.

USER: Thank you for your positive response.

ASSISTANT: There is no reservation found under your name in our data base.

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

ASSISTANT: Thank you for contacting us.