You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I planned to meet my friend in DCA, can you please help me to book a flight ticket from IAD?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: I prefer to travel on Jan 19 and Jan 21.

ASSISTANT: May I know your name to proceed further?

USER: I am Melissa Clark.

ASSISTANT: Do you have connection limit?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Here is a connecting flight in economy class with UA airlines, can I proceed with it?

USER: Ok, please confirm my booking.

ASSISTANT: Your ticket has been booked with 1010 flight.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.