You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: Robert Thompson here. Can you help me to book a flight ticket from SFO to BOS?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: I am planning to travel on 19 June to 21 June.

ASSISTANT: Do you have any preferences?

USER: I am comfortable with any class. I need a connecting flight.

ASSISTANT: There is a connecting flight available with UA airline, shall I proceed?

USER: Please proceed to booking.

ASSISTANT: Your booking is done with flight number 1013. Happy journey.

USER: Thank you for helping me in booking a flight ticket.

ASSISTANT: You are welcome, have a nice day.