You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Justin Garcia, want to travel from LGA to DCA. Can you please help me?

ASSISTANT: Sure, may I know your trip dates please?

USER: My trip dates are from 02/13 to 02/15.

ASSISTANT: Do you have any class preference?

USER: My class preference is economy class.

ASSISTANT: Do you have any other requirements?

USER: Make sure, my departing time and arriving time should be in the evening and morning respectively with 1 connection.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting and we have found a flight in economy class with 1 connection in United airlines and the fare of your flight will be 200. Do you like me to proceed your booking with this flight?

USER: Please proceed.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you.

ASSISTANT: My pleasure.