You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at this moment?

USER: I am Sarah Lee, can you help me in booking me a connecting flight which can departures in the evening from my location Washington?

ASSISTANT: Sure, when you are planning to make your journey?

USER: I have planned to make my journey from Dec 3rd to Dec 5th.

ASSISTANT: May I know your airport codes please?

USER: Sure, my airport codes are IAD and JFK.

ASSISTANT: Do you have any class preference?

USER: I am ok with any of the class.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there are no flights matching your journey dates.

USER: Not a problem, I will go by road trip to complete my trip. Anyways thank you for the information.

ASSISTANT: Thank you for choosing us.