You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Actually, when I am booking my flight I am in disturbance.So, I have mentioned wrong dates, so can you please recheck and re correct the travelling details of mine?

ASSISTANT: May I know your name?

USER: Myself Samuel Campbell.

ASSISTANT: Sorry Campbell, there is no reservation found with your name.

USER: That's ok, no issue. Thank you for your help.

ASSISTANT: Thank you for choosing us.