You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Will you please help me to book a flight ticket from IAD to BOS?

ASSISTANT: Sure, I am happy to help you. Can you please let me know your travelling dates?

USER: I want to take off on Oct, 20 and return back on Oct, 22.

ASSISTANT: Do you prefer any stopover in between journey?

USER: I need direct flight.

ASSISTANT: Are there any other specifications for you?

USER: No, thank you.

ASSISTANT: May I know your good name?

USER: Pamela Martinez here.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for contacting us.