You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Could you please help me with booking a normal cost airline?

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

USER: Sure, I would like to meet my brother on Oct 18, so I want to board a day before on Oct 17 and return on Oct 19.

ASSISTANT: Please provide your airport codes.

USER: My source airport code is DCA and destination airport code is PHL.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a stop over in between the journey.

ASSISTANT: Do you have any preferences about class?

USER: I am comfortable with any class.

ASSISTANT: Please provide if you have any other specifications.

USER: No, I do not have any other specifications.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. The UA airline is providing an economy class flight with price 100 and the connections 0. Shall I confirm your ticket?

USER: Yes, please proceed with booking.

ASSISTANT: Please mention your name.

USER: I am Thomas Mitchell.

ASSISTANT: Your ticket is booked. The flight number is 1008.

USER: Thank you for your help.

ASSISTANT: Welcome, have a great day.