You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to book a flight ticket from DCA to SFO?

ASSISTANT: Sure, I am here to help you. Please provide your travelling dates.

USER: My travel dates are 29 to 31 of Mar.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Can I have your good name?

USER: I am Christopher Perez.

ASSISTANT: Frontier Airlines is providing connecting flight with the ticket fare of 100 and depart time is 13:00 hours, arrival time is 2:00 hours. Shall I proceed?

USER: Please proceed.

ASSISTANT: Ok, your ticket is reserved in an economy class and the flight number is 1004.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.