You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you the best today?

USER: I would like to book a ticket from DCA to BOS, can you please help me with that?

ASSISTANT: Sure, can I know your good name please?

USER: Patricia King here.

ASSISTANT:  When you are willing to travel?

USER: The travel dates are from 04/10 to 04/12.

ASSISTANT: Do you have any other restrictions to be met?

USER: I need a flight with 1 connection limit.

ASSISTANT: Are there any more specifications?

USER: I would like to depart during morning time.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for choosing us.