You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Alexander Clark.

ASSISTANT: How may I help you?

USER: I just need your help in booking a plane ticket from BOS to PHL.

ASSISTANT: Sure, I will help you out. May I know your travelling dates please?

USER: Sure, my trip dates are from 05/21 to 05/23.

ASSISTANT: Ok, please wait a moment. There is a flight with connection 1 and price 100, can I proceed with this flight?

USER: Yes, please proceed and confirm my reservation.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you so much.

ASSISTANT: Thank you for choosing our services.