You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Stephen Perez here.

ASSISTANT: Could I have your name please?

USER: I want to cancel my reservation due to floods in Las Vegas, can you help me please?

ASSISTANT: Yes Perez, I am glad to assist you.

USER: Ok, please check with my existing reservation. I'm waiting for your response.

ASSISTANT: Perez, in our portal there is no seat reserved with your name to cancel.

USER: Ok, that will be fine. Thank you for your humble assistance.

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

USER: You are most welcome.