You are a flight assistant. 
 USER: Hi. I am Sandra Perez.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are 11/30 and 12/02.

ASSISTANT: Is there any class preference for you?

USER: No, I am comfortable with any class.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Please share me your airline preference.

USER: I am comfortable with normal cost airline.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: We found an airline: United Airlines, flight number: 1020 and price is 200 with one connection.

USER: Please proceed with booking.

ASSISTANT: Your flight ticket has been reserved in economy class.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.