You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Do you have any flight to Washington, DC - DCA on December?

ASSISTANT: Let me check, first provide me your exact dates of travelling on december.

USER: I need to attend my relative's marriage on 12/02 and return to my place on 12/04.

ASSISTANT: Ok, may I know your nearest airport code from where you would like to travel?

USER: Yes, I would like to travel from Austin, TX - AUS.

ASSISTANT: May I know your name please?

USER: Donna Anderson here. Please check the flight with connection 1.

ASSISTANT: Donna, wait a moment, I will get back to you with the best service on that route.

USER: Sure, take your own time.

ASSISTANT: Happy to inform you that there is a flight with all your requirements with the price of only 100 and flight number is 1002 from Southwest airline. Shall I proceed to book your tickets?

USER: Yes, go ahead to book ticket.

ASSISTANT: Donna, your ticket has booked successfully, hope you will enjoy your journey with Southwest airline as it is the best airline.

USER: Thanks for your kind assistance.

ASSISTANT: It's our pleasure. Thank you so much for flying with our service.