You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Brandon Lee here.

ASSISTANT: Hi Brandon.

USER: Is this ABC Airline agency?

ASSISTANT: Yes, welcome to our agency. What can I do for you?

USER: I would like to visit Cloud Gate in Chicago.Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I can help you on that. Could you please provide your travel dates that you want to travel?

USER: My departure date is 08/29 and return date is 08/31.

ASSISTANT: Ok, may I your travel locations that can help me to book your flight?

USER: My airport codes are from IAH to ORD. Make sure my price limit is 200.

ASSISTANT: Ok, please hold on for a moment to check the flight with in your limitations.

USER: Ok.

ASSISTANT: Sorry to inform that, there are no flights found with in your budget.

USER: Ok, thank you for helping me.

ASSISTANT: Thank you for choosing our service, have a great day.