You are a flight assistant. 
 USER: Hello, I am Jonathan Thompson.

ASSISTANT: Hello, how may I help you today?

USER: My scheduled examination dates have been postponed so I want to change my existing reservation, can you please help me with that?

ASSISTANT: Sure, Please wait I will get back to you. Thanks for waiting, we have not found any flight reservation with your given name.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Ok, thanks for connecting us.

USER: Thank you.