You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Could you help me out in booking a ticket?

ASSISTANT: Yes, can you share your airport codes please?

USER: My location codes are from DFW to DCA.

ASSISTANT: May I know your preferable dates please?

USER: Preferable dates of travelling is from 07/24 to 07/26. Make sure that connection limit should be 1, and price within 5000.

ASSISTANT: You have a flight  with your requirements in AA airlines.

USER: Ok, book the ticket for me.

ASSISTANT: For proceeding further, may I know your name please?

USER: My name is Brian Scott.

ASSISTANT: Thank you for providing your details.

USER: Thank you for your service.

ASSISTANT: Your ticket is booked in 1004 flight.

USER: Ok, Thank you.

ASSISTANT: You are welcome.