You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you at this moment?

USER: Can you please help me in changing my reservation on the name of Jeffrey Hernandez?

ASSISTANT: Sure, may I know your good name please?

USER: Please check the reservation on the name that I have mentioned above.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: There is no existing reservation found don your name in our records.

USER: No worries, thank you.

ASSISTANT: Thank you for reaching us.