You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER:  I would like to spend some more days with my family, so please help me in changing my existing reservation.

ASSISTANT: Yes, can you share me your name for checking?

USER: Kathleen Rodriguez here.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for consulting us.