You are a flight assistant. 
 USER: Hello, I am Frank Young.

ASSISTANT: Hello. How may I help you at this moment?

USER: I want to celebrate flower festival at Washington. Can you please book a ticket with a price limit of 500?

ASSISTANT: Sure, I can help you to book a flight ticket. Please share your planned travel dates?

USER: I want to travel on from 04/13 to 04/15.

ASSISTANT: Kindly ensure your origin airport with code?

USER: I want to fly from Houston, TX  -IAH.

ASSISTANT: Also mention your destination code?

USER: My destination code is Washington, DC - IAD.

ASSISTANT: Flight number 1000 in JetBlue airline with fare 100 available for you. Shall I make it confirm?

USER: You can book with this airline.

ASSISTANT: Ok, your booking has been done successfully with a connecting flight.

USER: Thank you for your assistance.

ASSISTANT: Thanks for approaching us, have a nice journey.