You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Sure, can you please provide me your good name?

USER: My name is Andrew Adams.

ASSISTANT: There is no reservation found under your name to do changes in that.

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

ASSISTANT: Thank you for choosing us.