You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you at this moment?

USER: Can you aid me to change my reservation due to an emergency that I have done recently?

ASSISTANT: Sure, I am happy to help you with that. Can I have your name please to check your reservation status?

USER: Eric Jackson here.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry Eric Jackson, there is no reservation has found under your name in our database.

USER: Ok, no problem. Thank you for the help.

ASSISTANT: Thank you for choosing us, have a good day.