You are a flight assistant. 
 USER: Hi, I am Melissa Nelson.

ASSISTANT: Hello, how can I help you today?

USER: Can you please be my helping hand in making a reservation under the price limit of 200?

ASSISTANT: Sure, kindly mention your travel dates?

USER: Travelling dates are from 06/12 to 06/14.

ASSISTANT: May I know your airport codes?

USER: From Denver, DEN to Washington, DCA.

ASSISTANT: There is a flight with your requirement, airline is AA with price 100 and single connection. Shall I proceed with booking?

USER: Ok. Proceed with booking.

ASSISTANT: Your booking is done.

USER: Thank you for addressing me.

ASSISTANT: Thanks for reaching us, have a good day.