You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Betty Martinez. I am planning to visit White house at Washington, DCA. Can you please book a direct flight for me?

ASSISTANT: Sure. When did you schedule your trip dates?

USER: Travelling dates are 03/15 to 03/17.

ASSISTANT: Let me know your origin.

USER: Source code is Phoenix, PHX.

ASSISTANT: Do you have any preferences?

USER: Price limit is 1000.

ASSISTANT: We found a direct flight to your destination. Shall I proceed?

USER: You can proceed.

ASSISTANT: Your ticket has been done with flight number 1029 in Delta airline.

USER: Thank you.

ASSISTANT: Thank you.