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 help me to book a ticket?

ASSISTANT: Ok, please can I know your name to proceed with the booking?

USER: Samantha Lee here.

ASSISTANT: Ok, please mention the airport codes of journey you have planned.

USER: My airport codes are DTW-IAD.

ASSISTANT: Can I know the dates of your journey to check for the availability?

USER: My trip dates are 11/15 and 11/17.

ASSISTANT: Ok, please can I know the connection limit of flight you desire?

USER: I need break in my journey.

ASSISTANT: Can you be precises about the airport codes?

USER: I already mentioned above.

ASSISTANT: I mean mention the source and departure code separately.

USER: My source code is DTW and departure code is IAD.

ASSISTANT: Ok, thank you for mentioning the details. Please wait a moment I will check.

USER: Ok.

ASSISTANT: There is a flight ticket available for the airfare 100 with a single connecting flight and the airlines is Southwest. The flight number is 1006, can I proceed with the booking?

USER: Please proceed.

ASSISTANT: Ok, the flight ticket is booked and the class is economy. Thank you for choosing our agency.

USER: Thank you.