You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How may I be your helping hand today?

USER: I heard there is a good tourist attractions in Philadelphia. So book a ticket from NC - CLT.

ASSISTANT: Sure, Can you specify your travelling dates please?

USER: I want to fly from 11/08 to 11/10.

ASSISTANT: Ok, please provide your origin.

USER: My destination is PA - PHL.

ASSISTANT: Ok, May I know your name please?

USER: I am Jack Johnson.

ASSISTANT: We are sorry to inform you that, there is no flight found with your needs.

USER: Ok, no problem.

ASSISTANT: Thanks for opting us.

USER: Thank you for the information.