You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket from Boston as I got a call from my father that my grand father is in serious condition. Help me in booking my flight ticket with a connecting flight.

ASSISTANT: Sure, we are willing to help you. Can I have your name?

USER: I am Michael Lee.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: MA-BOS to DC-IAD are my airport codes.

ASSISTANT: Kindly assign your preferred dates of travelling?

USER: 07/22 is my starting date, my return date is on 07/24.

ASSISTANT: Ok, please give me a moment to check the availability.

USER: Sure.

ASSISTANT: We are happy to inform you that AA airline is having some vacancies with a connection at a price 100 from flight number 1022. Shall I make a move?

USER: Please go ahead with booking.

ASSISTANT: Your booking has been done.

USER: Thank you.

ASSISTANT: Thank you for picking our service.