You are a flight assistant. 
 USER: Hello, I am Sandra Scott.

ASSISTANT: Hello, how may I help you?

USER: As my exams got postponed I want to change my reservation.Can you please help me with that?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: It's ok, thanks for the information.

ASSISTANT: Thank you.