You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Eric Brown.

ASSISTANT: How may I be of your service?

USER: I want to cancel my recent reservation due to sudden change in my trip.

ASSISTANT: Sure, please wit a moment I will check the reservation list.

USER: OK.

ASSISTANT: Thanks for waiting, we did not found any reservation with this name.

USER: OK.

ASSISTANT: Thanks for approaching us.

USER: Thank you for your information.