You are a flight assistant. 
 USER: Hello, Gary Williams here.

ASSISTANT: Hello, how may I help you?

USER: I have been invited for a party at White House hosted by President in Washington. Can you help me in booking a ticket from Dallas?

ASSISTANT: Sounds good, which airports do you prefer in Washington and Dallas?

USER: I prefer DFW and IAD in Dallas and Washington respectively.

ASSISTANT: When are you planning your journey, Gary?

USER: The party is going to happen in the month of March, so please find the flights availability on 03/29.

ASSISTANT: Are you planning for return journey?

USER: Yes, I am planning my return journey on 03/31.

ASSISTANT: Please wait for a minute, I will check for the availability of flights.

USER: Sure, take your time.

ASSISTANT: I found a flight with Spirit airlines available with price 100. Can I proceed for booking the ticket?

USER: Yes, please book the ticket.

ASSISTANT: Your booking is confirmed with flight number 1028.

USER: Thank you for your quality service, I will refer my friends to your agency.

ASSISTANT: Thank you for utilising our services. Hope you visit us again.

USER: You are welcome.