You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER:  As I am a scientist, I want to attend science festival with my students at Washington. Can you do the reservation?

ASSISTANT: Sure, I can help you with that. May I know your departure and return travel dates please?

USER: My journey dates are 07/25 and 07/27.

ASSISTANT: May I know your source and destination airport codes please?

USER: My airport codes are BOS-DCA.

ASSISTANT: May I know in which class and airlines do you prefer to travel?

USER: I do not have any preference.

ASSISTANT: Can I have your good name please?

USER: Joseph Wright here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Hawaiian airlines is providing a flight on that route with ticket fare of 100 and 1 connection, it's departure time is 19 PM and return time is 13 PM. Shall I proceed for booking?

USER: Go ahead.

ASSISTANT: I have successfully booked you an economy class ticket in flight-1002, have a safe journey.

USER: Thank you.

ASSISTANT: Thank you for choosing us.