You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I serve you?

USER: I am George Miller. I have a plan to visit White House at Washington, please book a flight ticket under price 200.

ASSISTANT: Sure, I can try to find a best flight within your budget.

USER: Thank you.

ASSISTANT: May I know when are you willing to travel?

USER: My travelling dates are from 09/19 to 09/21.

ASSISTANT: Are you okay with a connecting flight?

USER: I need a connection within my journey.

ASSISTANT: Kindly share your airport codes.

USER: I want to fly from IAD and its my round trip.

ASSISTANT: Ok, please give me a moment.

USER: Ok.

ASSISTANT: We found a flight with a tariff of 300. Is that Okay?

USER: I actually have some coupons can I redeem them now?

ASSISTANT: Sorry, no coupons can be applicable for this booking.

USER: No problem, thanks for the information.

ASSISTANT: Ok. Thank you for opting us.