You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Carol Adams. Can you help me in changing my recent reservation, as my exam is postponed?

ASSISTANT: There is no reservation on your name in our database.

USER: That's ok, thank you.

ASSISTANT: Do you want to know anything else?

USER: No, thank you for checking.

ASSISTANT: Thank you for opting us.