You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Barbara Scott here. I want to travel from IAD to CLT for attending a seminar. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will help you. Can you please provide your preferable dates of travelling?

USER: My departure date is 12/18 and return date is 12/20.

ASSISTANT: Please wait a moment to check the flights.

USER: Make sure my connections limit is 1.

ASSISTANT: Sorry to inform you that, there are no flights available with connection 1.

USER: Thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.