You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I best serve you today?

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

ASSISTANT: Sure, please share your travelling dates?

USER: Dates are 07/08 and 07/10.

ASSISTANT: May I know your source and destination?

USER: My airport codes are DCA-CLT.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a connecting flight with fare of 100 in Southwest airline. Shall I proceed for reservation?

USER: Go ahead.

ASSISTANT: May I know your name for reserving your ticket?

USER: Elizabeth Hall here.

ASSISTANT: Your ticket has been reserved.

USER: Thank you so much.

ASSISTANT: Thanks for approaching us, have a nice day.