You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I am planning to book a flight ticket to SEA from BOS, can you please help me out?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Sure, my planned travelling dates are Mar 28 and Mar 30.

ASSISTANT: Noted. Do you have any connection preferences?

USER: Yes, I am looking for a direct flight.

ASSISTANT: Do you have any other preferences? Sorry, there is no direct flight available on your journey dates.

USER: Yes, my return time must be in evening.

ASSISTANT: Sorry, we can't help you this time.

USER: It's ok, thank you for the information.

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

USER: Sure, my name is Joshua Martinez.

ASSISTANT: Thank you for opting us.

USER: Thank you.