You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please share your planned travel dates to proceed with the booking.

USER: My trip dates are 08/07 and 08/09.

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

USER: My airport codes are MSP-BOS.

ASSISTANT: Do you prefer either economy or business class?

USER: I am comfortable with any class?

ASSISTANT: Is there any specific time are you looking for your departure and return?

USER: My departure time should be evening.

ASSISTANT: Do you have any other preference?

USER: I need only direct flight.

ASSISTANT: Sure, may I know your name to book the flight ticket?

USER: Sharon Evans here.

ASSISTANT: Sorry, no direct flight available for your trip details.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you.