You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Emily Carter.

ASSISTANT: How can I help you today?

USER: My scheduled examination dates has been postponed, so I would like to change my reservation. Can you please help me with that?

ASSISTANT: Sure, I will help you. Sorry, no reservation found with your name.

USER: That's ok. Thank you for the information.

ASSISTANT: Thank you.