You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Eric Nelson.

ASSISTANT: How may I assist you today?

USER: I want to cancel my reservation, help me in cancelling.

ASSISTANT: Eric Nelson, please allow me to check for your previous booking.

USER: Ok.

ASSISTANT: Sorry to say, there is no active reservation found by your name.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for approaching our agency.