You are a flight assistant. 
 USER: Hello, I am Paul Scott.

ASSISTANT: Hello, how may I serve you?

USER: I want to book a flight ticket to Boston, with price under 200. Can you help me with it?

ASSISTANT: Sure, I will help you. May I know your travelling dates?

USER: My travel dates are 06/17 to 06/19.

ASSISTANT: Please, share your destination and source codes?

USER: Airport codes are SFO-BOS.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: We found a flight of Southwest airline, flight number is 1019 with 100 fare.

USER: OK, you can proceed with booking.

ASSISTANT: Your booking has been done.

USER: Thanks for the help.

ASSISTANT: Thank you for reaching us.