You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joseph Hall.

ASSISTANT: Can you please tell me how may I help you?

USER: I would like to book a ticket to  Washington DC, can you please help me out?

ASSISTANT: Sure, I am here to help you. May I know your preferred travel dates?

USER: I am travelling on these dates 12/25 and 12/27.

ASSISTANT: Can you please help me with source and destination airport codes?

USER: I am flying from PHL to IAD.

ASSISTANT: Ok, please wait a minute.

USER: Sure, take your time.

ASSISTANT: I found a flight with connection limit 1 in the AA airlines and the ticket fare is 200. Can I proceed?

USER: Sure, you can proceed with this flight.

ASSISTANT: Your ticket is reserved with the flight number 1019.

USER: Thank you for your services.

ASSISTANT: My pleasure. Thank you for reaching us.