You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you best?

USER: I am Stephanie Baker.

ASSISTANT: OK.

USER:  I need to cancel my recent reservation due to postpone delivery date for my wife. Could you please help me?

ASSISTANT: Ok, we have searched for your reservation but we did not find any reservation.

USER: No problem, thank you for your information.

ASSISTANT: Thanks for opting us, have a nice day.