You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I would like to cancel my reservation due to some personal issues, can you please help me out with that?

ASSISTANT: Sure, I am happy to help you with that. Can I have your name please to check your reservation?

USER: Thank you for accepting my request. Myself Sarah Wright.

ASSISTANT: Ok, please wait a moment to check existence of your reservation.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Sarah Wright, no reservation has found under your name to cancel.

USER: That's ok, no problem.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Anyway thank you for the information.

ASSISTANT: Most welcome.