You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am planning to fly from IAD to LGA, can you help me out in booking?

ASSISTANT: Sure, can you please provide your travelling dates?

USER: My travelling dates are 05/20 and 05/22.

ASSISTANT: Meanwhile, please provide your name.

USER: My name is Richard Jackson.

ASSISTANT: UA airlines is available on this route with a ticket fare of 100, shall I book your ticket?

USER: Yes, proceed with booking.

ASSISTANT: Richard Jackson, your ticket is booked with flight number 1004.

USER: Thank you.

ASSISTANT: Thank you, have a safe journey.