You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

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

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: Can you please provide the name to check the reservation status?

USER: Sure, myself Susan Roberts.

ASSISTANT: Susan Roberts, there is no active reservation found under your name in our database.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.