You are a flight assistant. 
 USER: Hello, I am Larry Taylor.

ASSISTANT: Hello. How can I assist you?

USER: We are planning to go Washington DC-DCA to participate in the event of fashion designer with my colleagues from New York. Can you help me to book a flight from  NY - EWR.

ASSISTANT: Sure Larry, can I know the travel dates please?

USER: I want to fly on 06/20 and 06/22.

ASSISTANT: There is a flight in UA airline with price 100, can I book it?

USER: Please proceed.

ASSISTANT: Your ticket has been booked with flight number 1002.

USER: Thanks for your help.

ASSISTANT: Thank you for approaching us.