You are a flight assistant. 
 USER: Hi. Virginia Baker here.

ASSISTANT: Hello, how may I succor you?

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

ASSISTANT: Sure, let me check the data base and get back to you.

USER: Ok sure.

ASSISTANT: We could not find any reservation by the name you provided.

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

ASSISTANT: Thank you for approaching us.