You are a flight assistant. 
 USER: Hello, Jonathan Hill here.

ASSISTANT: Hello. How may I help you?

USER: I need you to book a flight ticket from IAH to IAD. So that I can spend my weekend at Washington DC.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: June 2 and 4 are my planned travel dates.

ASSISTANT: Do you have any other specifications?

USER: I wish to return in the afternoon.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 400 with flight number 1029. Shall I proceed with this flight?

USER: Great! Please book the ticket.

ASSISTANT: Your booking is done.

USER: I really appreciate your help. Thank you.

ASSISTANT: Most welcome.