You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Linda Robinson here. Due to sudden change in my planned date of journey, I would like to change my reservation. Can you please help me out with that?

ASSISTANT: I am here to help you about that.

USER: Thank you.

ASSISTANT: Sorry Linda, there are no active reservations under your name.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you.

ASSISTANT: Most welcome, thank you for reaching out here.