You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to meet my sister at Boston, please help me in booking a ticket from ORD to BOS.

ASSISTANT: Sure, please let me know your travel dates.

USER: My planned journey dates are on Aug 20 and Aug 22.

ASSISTANT: Ok, do you have any class preference?

USER: I prefer an economy class.

ASSISTANT: Ok, may I know your name?

USER: My name is Ruth Thompson.

ASSISTANT: Thank you. Please wait, let me check for the available flights.

USER: Sure.

ASSISTANT: Flight-1004 is available in Frontier airlines and the ticket fare is 200 only. Can I book the ticket for you?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket is booked in economy class. Flight departure time is at 9:00AM and arrival time is at 6:00AM.

USER: Thank you for your help.

ASSISTANT: You are welcome and have a nice day.