You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I am planning to meet my childhood friend in IAD, can you please help me in booking a flight ticket from DFW?

ASSISTANT: Sure, May I know the travelling dates?

USER: I want to fly on June 17 and return on June 19.

ASSISTANT: Do you have any connection limit?

USER: I need a direct airline.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: Myself Virginia Anderson.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for opting us.