You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need you to book a flight ticket from ORD and DFW, please help me.

ASSISTANT: Sure, I will help you. May I know your name?

USER: Barbara Young.

ASSISTANT: Thank you. Please tell us your travel dates.

USER: June 19 and 21, are my planned travelling dates.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I need a break in between my journey.

ASSISTANT: Noted. Please be on hold for a while.

USER: Sure, I will wait.

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

USER: That's ok. Thank you.

ASSISTANT: You are most welcome.