You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Emma Campbell.

ASSISTANT: How can I help you today?

USER: I have a plan to attend a music concert in Dallas, can you help me for booking a flight ticket?

ASSISTANT: Sure, can you please share your trip dates?

USER: My travelling dates are from 09/16 till 09/18. My travelling airport codes are from DCA to DFW.

ASSISTANT: Here, I found a flight for you with 1 connection and fare is 100. Shall I proceed?

USER: Please don't proceed, I want a flight with single connection. Sorry, I need a direct flight.

ASSISTANT: Ok. Sorry, no flights are available.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome.