You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Donna Scott here.

ASSISTANT: How can I help you?

USER: I have already booked my flight ticket and I would like to change the departure date. So can you help me in change of flight ticket reservation?

ASSISTANT: Ok, I will help you with that. Please, wait for a while.

USER: Sure.

ASSISTANT: Sorry, we have found no reservation on your name in our records.

USER: The flight ticket was booked on the name of Donna Scott.

ASSISTANT: Ok. Thank you for opting us.

USER: Thank you.