You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this moment?

USER: Due to an emergency, I want to change my reservation. Can you help me?

ASSISTANT: Sure, I am here to help you with that. May I know your name?

USER: Justin Jackson here.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.