You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your name?

USER: I am Patrick King.

ASSISTANT: How can I assist you?

USER: Can you help in booking a flight ticket with price under 1000?

ASSISTANT: Sure, we are here to help you. Please share your travelling dates.

USER: My arrival must be on 08/18 and depart must be on 08/16.

ASSISTANT: Can you help me out with your airport codes?

USER: I want to reach Orlando, FL - MCO from Washington, DC - DCA to have ah baseball city experience.

ASSISTANT:  Ok then, please wait a couple of minutes. I will get back to you with flights availability.

USER: Sure.

ASSISTANT: Thanks for your time. We found a AA airline, flight number:10021 and the price is 100.

USER: Great, please book my ticket.

ASSISTANT: Your flight ticket has been processed.

USER: Thanks for your prompt service.

ASSISTANT: Thank you for choosing us.