You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I assist you?

USER: Jeffrey Miller this side, I have got an invitation from White House and I need to go there on 05/18 and return by 05/20. Can you help me in booking?

ASSISTANT: Sure, may I know your journey codes?

USER: Sure, I am going from CLT to DCA.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: We found a flight with number 1015 and Southwest as airline. The cost of the ticket is 100.

USER: Please make it reserve for me.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us.