You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me to book a flight from BOS to IAD?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: My journey dates are on Sept 19th to 21st.

ASSISTANT: Ok, please share me your name.

USER: Sure, I am Mark Thompson.

ASSISTANT: Ok, do you have any connection limit?

USER: Yes.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: Here, I found a flight for you with single connection and class is economy. Shall I proceed for booking?

USER: Ok, you can proceed.

ASSISTANT: Your ticket is booked with flight number 1021 and airline is JetBlue.

USER: Thank you.

ASSISTANT: Welcome, have a safe flight.