You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Please make a reservation with the name of William Jackson from CLT.

ASSISTANT: Ok, may I know your travelling dates?

USER: My travelling dates are Oct 15 and Oct 17.

ASSISTANT: Ok, may I know your depart and arrival timings?

USER: I want to return in the evening.

ASSISTANT: May I know your connection limit.

USER: I need a single connecting flight.

ASSISTANT: May I your destination airport code?

USER: Destination airport code is IAD.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no flights found on your route.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for reaching us.