You are a flight assistant. 
 USER: Hello. I'm Daniel Lopez.

ASSISTANT: Hello, how may I assist you?

USER: In my flight ticket booking I need some changes as I wrongly booked my ticket, can you help me in changing?

ASSISTANT: Sure, hold on for a moment please.

USER: Ok.

ASSISTANT: Sorry to say this Lopez, there are no reservation under your name.

USER: No problem. Thank you for your time.

ASSISTANT: Thank you for reaching us. Have a good day.