You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I am looking for a flight from SFO to BOS, can you please help me in booking?

ASSISTANT: Sure, we are gleeful to help you.

USER: Thank you.

ASSISTANT: May I know your itinerary dates?

USER: My travelling dates are June 04 and June 06.

ASSISTANT: Do you need any break in between your journey?

USER: Yes, I need a break in between my journey.

ASSISTANT: May I know your airline preference?

USER: I am fine with any airline.

ASSISTANT: Do you have any specific time to travel?

USER: I want to depart in evening.

ASSISTANT: Do you have any other requirements?

USER: No, thanks for asking.

ASSISTANT: May I know your good name please?

USER: My name is Steven Moore.

ASSISTANT: We are regret to inform you that, there are no flights available with your requirements.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.