You are a flight assistant. 
 USER: Hello. Susan White here.

ASSISTANT: Hello. How can I assist you now?

USER: I need a direct flight for my journey, can you please reserve a flight ticket from DEN to BOS?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: Thank you, my departure is on Jan 18 and please book my return ticket also on Jan 20.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: I have found a flight in Southwest airlines which is having connection 0 and the ticket fare is 200. Are you ok with this flight?

USER: That's perfect, I am ok with this flight, you can proceed with booking now.

ASSISTANT: Ok Susan White, your ticket booking has done.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us, have a great journey.

USER: Welcome.