You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you aid me to book a ticket from IAD to CLT?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My trip dates are Mar 27 and Mar 29 respectively.

ASSISTANT: Can I know your connection limit?

USER: I prefer for single connecting flight.

ASSISTANT: Let me know your name?

USER: Katherine Scott here.

ASSISTANT: Sorry to say, no flight is available for you as per your requests.

USER: Ok. Thank you for the help.

ASSISTANT: Thank you for reaching us.