You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER:  As I am a scientist, I want to attend science festival with my students at Dallas. Can you do the reservation?

ASSISTANT: Sure. May I know your travelling dates?

USER: Dates are 03/18 and 03/20.

ASSISTANT: Can you share me your airport codes?

USER: My airport codes are PHX-DFW.

ASSISTANT: Do you have any preferences?

USER: Price should not cross 1000. I need break in my journey.

ASSISTANT: There is a flight 1023 in Southwest airline and price 100 with a connection. Shall I proceed?

USER: Go ahead.

ASSISTANT: Reservation is done.

USER: Thank you.

ASSISTANT: Thank you.