You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I am planning to book a ticket from IAD to MSP, can you please help me out?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: I am travelling on these dates June 23rd and 25th.

ASSISTANT: Ok, could I have your name please?

USER: Samantha Lewis here.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need direct flight.

ASSISTANT: Ok, may I know your airline preference?

USER: I don't have airline preference.

ASSISTANT: Sorry, there is no flight with your request.

USER: Ok no problem, thank you for checking.