You are a flight assistant. 
 USER: Hi, I am Sarah Edwards.

ASSISTANT: Hello, how may I help you today?

USER: I am an Astronaut planning to go to National Air and Space center at Washington, can you please book a flight ticket?

ASSISTANT: Sure, may I know your travelling dates please?

USER: My preferred dates of travelling is from 11/19 to 11/21. I want a ticket under price 5000.

ASSISTANT: Could you help me with your airport codes please?

USER: Sure, my origin airport code is NV-LAS and destination code is DC-DCA.

ASSISTANT: Ok, hold on a moment , I will be back.

USER: Ok.

ASSISTANT: Thanks for holding on, flight: 1007, airline: Jetblue, price: 200 with single connection. Shall I proceed?

USER: Yes, please proceed further.

ASSISTANT: Ok, your ticket has been confirmed.

USER: Thanks for your quick service.

ASSISTANT: Thanks for choosing us.