You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please book a flight ticket from IAD to MSP?

ASSISTANT: Sure, may I know your name?

USER: Thank you. Myself Margaret Martinez.

ASSISTANT: Thank you. Can I know your travel dates?

USER: Sure, I have planned my travel dates as Mar 05 and Mar 07.

ASSISTANT: Noted. Do you prefer for a direct flight or a connecting flight?

USER: I am looking for direct flight so please make sure that.

ASSISTANT: Sure, is there any other requirements?

USER: Yes, I am looking for economy class to travel.

ASSISTANT: Noted. Please wait for a while, let me check.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no direct flight available on your preferred travel dates.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: You are most welcome and have a nice day.