You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I want to stay for some more days with my friend in New York, can you please help me to change my reservation?

ASSISTANT: Ok, let me know your name to check with the reservation.

USER: My name is Stephanie Carter.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: No reservation was found on your name by our agency, Stephanie Carter.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing our services. Have a nice day.