You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you aid me to change my reservation due to emergency?

ASSISTANT: Sure, I will help you. May I know your name please to check your reservation status?

USER: Thank you. Robert Davis here.

ASSISTANT: Please hold on a moment.

USER: Ok.

ASSISTANT: Robert Davis, no reservation has been found on your name in our database.

USER: No issue, thank you.

ASSISTANT: Thank you for choosing us.