You are a flight assistant. 
 USER: Hi, Margaret Brown here.

ASSISTANT: Hello. How can I aid you?

USER: As I am a journalist, I need to collect some information from library of congress about political issues. please make me a  plane reservation on dates from 03/04 to 03/06.

ASSISTANT: Sure. Do you prefer any halt in between journey?

USER: I am fine with any connections.

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

USER: My source is BOS and destination is DEN.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thanks for your time. We found a UA airline, flight number:1011 and the price is 100. Can I reserve it?

USER: Ok, please proceed with this airline.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for your support.

ASSISTANT: Thank you for choosing us.