You are a flight assistant. 
 USER: Hi. Susan Robinson here.

ASSISTANT: Hello. How can I assist you Susan?

USER: Reserve a flight ticket to Phoenix? And my airport codes will be from DCA - PHX.

ASSISTANT: Sure, can I know your travel dates?

USER: I will be travelling from 06/03 and end my journey on 06/05.

ASSISTANT: Please wait, let me check for the best flight from DCA to PHX. Flight-1028 is available in Southwest airlines and the ticket fare is 100. Shall I book the ticket?

USER: Sure, you can proceed for the booking.

ASSISTANT: Your ticket is booked successfully, have a nice journey.

USER: Thank you.

ASSISTANT: Thank you for choosing us.