You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I am Donna Wilson. Could you help me in booking a flight ticket from TX - DFW to WA - SEA?

ASSISTANT: Sure, may I know when are you willing to make your trip?

USER: I want to fly on 08/12, return on 08/14.

ASSISTANT: What is your fare estimate for this booking?

USER: My price limit is 500.

ASSISTANT: We have an AA airline with flight number 1015 that is leaving from DFW and arrive at SEA with the airfare of 100. Is that okay?

USER: You can reserve it.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.