You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I am Kathleen Edwards. My exam schedule has been post postponed, So I want to change my existing reservation. Can you please help me with that?

ASSISTANT: Sure, please wait a moment, I will check the reservation.

USER: Ok.

ASSISTANT: There is no reservation on your name.

USER: Ok, no issues.

ASSISTANT: Thank you so much for choosing us.

USER: Thanks for your information.