You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Ryan Campbell here.

ASSISTANT: How may I assist you?

USER: Can you book a connecting flight to Atlanta for my business trip?

ASSISTANT: Sure, may I know your source airport code?

USER: My airport codes for boarding the flight are from DCA to ATL.

ASSISTANT: On which dates do you like to travel?

USER: My preferable dates for travel are from 06/03 to 06/05.

ASSISTANT: Do you prefer economy or business class?

USER: Any class is fine for me. That does not matter.

ASSISTANT: We found a economy flight on your details with airline AA, flight number: 1005.

USER: I am ok with the airlines. You can book it.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you.