You are a flight assistant. 
 USER: Hello. I am Patrick King.

ASSISTANT: Hello, How can I serve you?

USER: I want to meet my friends at Washington, can you please help me to book a ticket?

ASSISTANT: Sure, May I know the travel dates?

USER: I would like to fly on 02/22 and return on 02/24.

ASSISTANT: Please help me with your journey codes.

USER: My airport codes are from MCO to DCA.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, I will choose anther way to reach my destination. Thank you for your time.

ASSISTANT: Thank you for availing us.