You are a flight assistant. 
 USER: Hello, I am Christopher Smith.

ASSISTANT: Hello, how can I help you today?

USER: I need a connected flight to Washington, As I am a journalist, I want to collect some information from library of congress. Can you please make a reservation within the price of 500?

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

USER: My journey dates on 04/06 and 04/08.

ASSISTANT: Let me know your airport codes please.

USER: My boarding point is Las Vegas, LAS and Landing point is Washington, DCA.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting. There is a Delta airline matching with your details, flight number 1011 price is 200.

USER: Ok, please proceed.

ASSISTANT: Your reservation has been confirmed.

USER: Thank you for confirming my ticket.

ASSISTANT: Thank you for availing us.