You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My friend is staying at Washington, so I would like to go there to celebrate her birth day on  05/12. Can you help me in booking a ticket?

ASSISTANT: Sure, could you please provide me your airport codes?

USER: My airport codes are MSP and IAD.

ASSISTANT: May I know your good name please?

USER: I am John Anderson.

ASSISTANT: May I know your starting date please?

USER: My return date is 05/14. I will start on 05/12.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a flight on your details with airline Delta, flight number: 1022. Shall I proceed for booking?

USER: Yes, please.

ASSISTANT: Your ticket has been booked.

USER: Thank you for the help.

ASSISTANT: Thank you so much choosing us. Have a nice day.