You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning to travel from BOS to SFO, help me in booking a flight?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My travelling dates are May 28 to 30.

ASSISTANT: Do you have any specifications?

USER: I want to departure in afternoon.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Please provide your name.

USER: I am Carolyn Robinson.

ASSISTANT: The United Airlines providing an economy class flight with price 200 and the connections 0. Shall I confirm your ticket?

USER: Yes, proceed.

ASSISTANT: Your ticket is booked. The flight number is 1001.

USER: Thank you.

ASSISTANT: Welcome, have a great day.