You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to visit Brooklyn Bridge with my team. Can you help me to book a flight ticket?

ASSISTANT: Ok, may I know your travelling dates?

USER: My trip dates are 09/24 and 09/26.

ASSISTANT:  Could you provide me your travel points?

USER: My airport codes are DCA-EWR.

ASSISTANT: Ok, please wait I will revert you.

USER: Sure.

ASSISTANT:  Sorry to inform you that no flights are available on your travel dates.

USER: No problem, Thanks for the information.

ASSISTANT: May I know your good name?

USER: Carol Jones here.

ASSISTANT:  Thank you for availing us.