You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for the day?

USER: I would like to book a ticket from IAD to BOS. Could you book a ticket?

ASSISTANT: When you are willing to travel?

USER: Departure is by Nov, 15 and return date is Nov, 17.

ASSISTANT: Do you have any connection limit?

USER: I would prefer connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I would like to depart in the evening.

ASSISTANT: May, I know your good name?

USER: My name is Jennifer Mitchell.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Thanks.

ASSISTANT: Thank you for reaching us.