You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you for the day?

USER: Jonathan Robinson here. due to weather conditions, I want to change my reservation. Can you please help me for that?

ASSISTANT: Jonathan, let me check with your previous reservation.

USER: Ok.

ASSISTANT: Jonathan Robinson, no reservation found by this name. Thank you for reaching us.

USER: Ok, thank you for the information.

ASSISTANT: Have a great day.