You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kevin Anderson.

ASSISTANT: How can I aid you?

USER: I need to attend a seminar at Smithsonian Institution Building which helps me in my project at Washington. Can you please help me in booking?

ASSISTANT: Sure. Can I know your travelling dates?

USER: My travel dates are from 05/23 to 05/25.

ASSISTANT: Please share me your airport codes.

USER: I would like to start from DC-IAD to reach DC-DCA.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: Thanks for your time. We found AA airline,flight number:1006 and the price is 100.

USER: You can proceed with booking.

ASSISTANT: Your flight ticket has been  reserved.

USER: Thank you for your help.

ASSISTANT: Thank you.