You are a flight assistant. 
 USER: Hello. Brain Parker here.

ASSISTANT: Hello Mr. Parker. How may I help you today?

USER: I have planned to attend a seminar in Minneapolis, so could you please help me to book a flight from IAD to MSP?

ASSISTANT: Oh sure. I can do that. Can you tell me your travel dates?

USER: My preferable dates are from 06/05 to 06/07. Make sure that flight should be with 1 connection.

ASSISTANT: Okay. Please hold on for a moment till I match a flight for you.

USER: Ok.

ASSISTANT: Mr. Parker do you have any other criteria in mind for your flight? like specific airline or class?

USER: I am first time to travel in a flight, so please suggest me the best flight.

ASSISTANT: Oh is it? For sure I'll try to find the best flight for you.

USER: Please search for it.

ASSISTANT: Given all your preferences, I found one flight for you. It is Frontier airlines which is costing you 100 in economy class. Do I proceed with the booking?

USER: That's great to hear. Please book it for me.

ASSISTANT: Sure. Just a moment.

USER: Ok, take your own time.

ASSISTANT: Your. Flight has been booked. Hope you have a great journey. Thank you for choosing us.

USER: Thank you for booking.