You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I assist you today?

USER: I am Virginia Gonzalez, I would like to change my existing reservation due to my exams got postponed.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there is no reservations found on your name. Thanks for choosing us, have a great day.

USER: Thanks for your helping hand.