You are a flight assistant. 
 USER: Hello. My name is Stephanie Mitchell.

ASSISTANT: Hello. Mitchell, how may i assist you?

USER: Prepone plan came into picture owing to announcement of birth of baby boy.

ASSISTANT: Sure, let me know the dates and airport codes?

USER: So I want to cancel my recent reservation.Can you please help me?

ASSISTANT: Let me check with your reservation. I did not found any bookings on your name Stephanie.

USER: That's ok.

ASSISTANT: You may have already cancelled your booking.

USER: Thank you for your time.

ASSISTANT: Thank you.