You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, May I know your name?

USER: Sure, my name is Brenda Lewis from Washington.

ASSISTANT: How may I assist you?

USER: On 07/15, I have planned to book a flight to reach Denver to visit the Zoo there with my friends, so please help me in booking a flight to DEN.

ASSISTANT: Sure, please provide your source airport code.

USER: My source airport code is IAD.

ASSISTANT: Ok, when do you want to return?

USER: I intend to return on 07/17.

ASSISTANT: Ok, May I know your price limit?

USER: Sure, my price limit is 5000.

ASSISTANT: Thank you for providing your details, we found a connecting flight in 1017 AA airline with a fare of 100. Can I proceed for booking?

USER: It's perfect, you can proceed.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.