You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is David Green.

ASSISTANT: Could you please tell me how may I assist you?

USER: I am planning to travel from PHL to IAD, could you please help me with that?

ASSISTANT: Ok, sure can you please tell me your travelling dates?

USER: My departure date is 05/19 and return date is 05/21. Make sure that the price limit should not exceed 500 and connection should be 1.

ASSISTANT: As per your details there is a flight for you with price 300 and connection limit is 1. May I proceed with this ticket?

USER: Please confirm the booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for the help.

ASSISTANT: Thank you for contacting us, have a nice journey.