You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Frank Lee.

ASSISTANT: How may I help you, Frank?

USER: Can you help me searching flights with connection 1?

ASSISTANT: Sure. Can you please provide me your journey dates?

USER: My journey dates are 08/11 and 08/13.

ASSISTANT: Which airports do you prefer to travel?

USER: My preferable travelling airport codes are DCA to PHL.

ASSISTANT: Please give me a minute, Lee.

USER: OK.

ASSISTANT: I found a flight in Delta airlines available with price 200. Shall I book the ticket for you?

USER: Ok, book it.

ASSISTANT: Your ticket is confirmed and the flight number is 1006.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us, have a good day.