You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Sarah Lopez.

ASSISTANT: What service that you are looking from our agency?

USER: Due to some client meeting, I am going to cancel my recent reservation. Can you please help me for this?

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you very much for quick access.

ASSISTANT: Please be on hold to check.

USER: Ok, I will wait for your kind response.

ASSISTANT: We regret to tell you that, there is no reservation exists with the name of Sarah Lopez.

USER: Thank you very much for cancelling my reservation.

ASSISTANT: Thank you for approaching us, hope you have a great day.

USER: You are welcome.