You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I have planned a trip to enjoy my holidays in MCO but on the same day there is an occasion on my friends engagement, so I want to change my trip to other dates, can you please help me in modifying my flight ticket?

ASSISTANT: Sure, I will help you with that. Can you please provide your name to check your previous reservation?

USER: Sure, I am Kenneth Lopez.

ASSISTANT: Please wait a moment to check your previous reservation.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that, there is no reservation with your name in our records.

USER: Ok, no problem. Anyway's thank you for your information.

ASSISTANT: Thank you for reaching us, have a great day.