You are a flight assistant. 
 USER: Hello, William Collins here.

ASSISTANT: Hello. How can I assist you?

USER: I have to donate blood at an hospital in Orlando, could you quickly book a flight ticket for me?

ASSISTANT: Sure, I am glad to help you with  that. Could you please mention your travel dates?

USER: I have to leave on January 19 and revert back by January 21.

ASSISTANT: Can you please tell me your airlines preference?

USER: I am fine with any airlines. I request you to check for the economy class.

ASSISTANT: Ok, may I know your airport codes please?

USER: DCA and MCAO are the respective airport codes.

ASSISTANT: Ok, please give me a moment to check the flight availability.

USER: I am sorry It is *MCO.

ASSISTANT: Ok.

USER: Please make it fast, I am in hurry.

ASSISTANT: There is a flight in Delta airlines with the connection limit 1 and the price is 200. Shall I proceed?

USER: Thank you, please book the flight.

ASSISTANT: Ok, I have reserved your ticket with the flight number 1005. Have a safe flight.

USER: Thank you for your quick service. Have a great day.

ASSISTANT: You are most welcome. Thank you for reaching us.