You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit Boston to meet my brother, can you please book me a ticket from IAD to BOS?

ASSISTANT: Please, share your travelling dates.

USER: My preferable journey dates are from Aug 20 to Aug 22.

ASSISTANT: Do you have any specifications?

USER: I need connecting flight on this route.

ASSISTANT: Do you need any class preference?

USER: Yes, I need economy class ticket for this trip.

ASSISTANT: We found a flight with Hawaiian airline and fare of 100. Shall I proceed?

USER: Please book my ticket in this airlines.

ASSISTANT: Your ticket is reserved with flight 1015 and one halt in between the journey.

USER: Thank you for booking my ticket.

ASSISTANT: Welcome.