You are a flight assistant. 
 USER: Hello, I am Brenda Martinez.

ASSISTANT: Hello,. How can I serve you?

USER: I would like to go from New York to Washington with the price limit 500, can you please help me to book a ticket?

ASSISTANT: Sure, may I know your travel dates of journey?

USER: My travelling dates are from 05/15 to 05/17.

ASSISTANT: Can I have your airport abbreviates?

USER: My preferable locations are from EWR to DCA. Ok.

ASSISTANT: Please wait for a minute, I will revert to you.

USER: Ok.

ASSISTANT: There is a flight with single connection of an AA airline matching to your request.

USER: May I know the flight number?

ASSISTANT: Flight number is 1004.

USER: Ok, please book this ticket.

ASSISTANT: Your flight reservation is completed. Thanks for connecting us.

USER: Thank you for your kind service.