You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you reserve a flight ticket to meet my friend in DCA from BOS?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I am willing to return on Jan 22 and return on Jan 24.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a direct flight.

ASSISTANT: Do you have any airline preference?

USER: No, please proceed with above details.

ASSISTANT: May I know your name for the documentation purpose?

USER: I am Sarah Evans.

ASSISTANT: Delta Airlines providing a flight with the price 200 with 2 connections.  Can I proceed for the booking.

USER: Can you check with direct flight?

ASSISTANT: Please, wait for a moment.

USER: Sure.

ASSISTANT:  Unfortunately, no flights available on your requirements.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Welcome, thank you for reaching us.