You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Emma Harris. I would like to visit Washington Monument with my wife on our marriage anniversary. Can you help me in booking flight ticket?

ASSISTANT: Yes, can I know your travelling dates?

USER: My departure date is 04/19 and return date is 04/21.

ASSISTANT: Ok, could you share me your travelling airport codes?

USER: I want to departure from AZ-PHX airport because it is near to my location and final destination airport code is DC-DCA.

ASSISTANT: Ok. Give me a moment, I will get back to you.

USER: Ok.

ASSISTANT: I have found a flight for you with a fare of 200 and 1 connection. Can I proceed?

USER: Please proceed.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you for your service.

ASSISTANT: You are welcome.