You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to attend a Cultural Event in CLT, so please help me in booking a flight ticket from IAD.

ASSISTANT: May I know your travelling dates?

USER: I want to fly on Apr 08 and return on Apr 10.

ASSISTANT: Can I know your connection limit?

USER: I need a direct airline.

ASSISTANT: Please let me know your name?

USER: Myself Matthew Lee.

ASSISTANT: Sorry, no tickets available in direct flight.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.