You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Can you please help me to book flight ticket from PHL to SFO?

ASSISTANT: Sure, we are glad to help you. May I know your travelling dates?

USER: My trip dates are Sept 21 and Sept 23.

ASSISTANT: Do you have any break in between journey?

USER: I need a break in between my journey.

ASSISTANT: May I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Is there any other specifications for you?

USER: I do not have any other specifications.

ASSISTANT: On which name would you like me to book the flight?

USER: Carolyn Perez here.

ASSISTANT: We found a connecting flight in Delta airline with a fare of 200 which departs at 11:00 and return at 12:00. Shall I proceed for booking?

USER: You can proceed.

ASSISTANT: Ok, your ticket is reserved in an economy class and the flight number is 1027.

USER: Thank you for booking.

ASSISTANT: Thank you for availing us.