You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: Can you please book a flight ticket on dates Sept 13 and Sept 15?

ASSISTANT: Sure, I am here to help you with that. May I know your airport codes please?

USER: My airport codes are IAH and PHX.

ASSISTANT: Let me know your connection limit.

USER: I need a connecting flight.

ASSISTANT: Do you have any class preference?

USER: I need a ticket in the economy class.

ASSISTANT: May I know your other specifications, if any?

USER: I don't have any other preferences.

ASSISTANT: Please, provide me your name to proceed.

USER: My name is Sandra Evans.

ASSISTANT: United Airlines is providing you the direct flight in economy class with a price of 200, shall I proceed?

USER:      Yes, please.

ASSISTANT: Your ticket has been reserved with flight-1003.

USER: Thank you.

ASSISTANT: My pleasure, have a safe journey.