You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can you please tell me how can I assist you?

USER: I am planning to go Washington to celebrate my brother birthday. Can you help me to book a flight ticket?

ASSISTANT: May I know your travel dates?

USER: Trip dates are 03/26 and 03/28.

ASSISTANT: Please mention your travel codes?

USER: Airport codes are LAX-DCA.

ASSISTANT: May I know your name?

USER: Elizabeth Collins here.

ASSISTANT: A founds a flight with 1010 flight and AA as airline which provides flight in your route and satisfies your requirements. May I  proceed?

USER: Please carry on.

ASSISTANT: Ok, your ticket has been booked with price 100.

USER: Thank you for quick response.

ASSISTANT: Thank you for reaching us.