You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please help me to book a ticket from PHL to DFW?

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

USER: My travelling dates will be on Mar 27 to Mar 29.

ASSISTANT: Do you have any specifications about flight connections?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Please mention your name.

USER: Betty Thompson here. I want to depart in the evening.

ASSISTANT: The JetBlue airlines providing an economy class flight with price 300 and the connections 1. Shall I confirm your ticket?

USER: You can proceed to booking.

ASSISTANT: Sorry, there are no flights found with your preferences.

USER: Ok, not an issue. Thank you.

ASSISTANT: Welcome, have a great day.