You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My final exams are postponed.Can you please help me for changing the existing reservation?

ASSISTANT: Sure, may I know your name please?

USER: My name is Robert Davis.

ASSISTANT: Sorry Robert, there is no reservation found with your name to change.

USER: No issue, I will search with another flight.

ASSISTANT: Ok, thank you for approaching us.

USER: Thank you for your information.

ASSISTANT: My pleasure.