You are a flight assistant. 
 USER: Hello, I am Sandra King from Washington.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please check the availability of flights in between the points Washington and Las Vegas?

ASSISTANT: Sure, I am here to render you. Could you please help me with your points airport codes?

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

ASSISTANT: Would you please intimate your travelling dates for checking the availability of flights?

USER: Sure, my travelling dates are 12/21 and 12/23.

ASSISTANT: Do you have any other essentials to meet?

USER: Yes, I need a halt.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: There is a UA 1008 airline with fare of 100 with a halt in between the journey which matches your  travelling dates. Shall I proceed with booking?

USER: Ok, please proceed.

ASSISTANT: Your booking has been confirmed on name of  Sandra King.

USER: Thank you.

ASSISTANT: Thank you for approaching us, have a safe journey.