You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Ok, please let me know your name to check the data base.

USER: I am Virginia Parker.

ASSISTANT: There is no reservation found by this name.

USER: Ok. Thank you for your help.

ASSISTANT: Thank you for opting us.