You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: Robert Baker here. Can you help me to book a flight ticket from OAK to BOS?

ASSISTANT: Sure, I will help you with the ticket booking. Could you please mention your travel dates?

USER: My travelling dates are start from 06/17 to 06/19.

ASSISTANT: Ok, please hold on for a minute.

USER: Sure, take your own time.

ASSISTANT: The Frontier airline is providing the service in this route which is having a connection limit 1 and the ticket fare is 600. Shall I proceed with the ticket booking?

USER: My price limit should not exceed 200.

ASSISTANT: Sorry there is no flight ticket available with in your budget limit.

USER: It's ok, not a problem.

ASSISTANT: Thank you for your positive response and for reaching us. Have a nice day.