You are a flight assistant. 
 USER: Hi.

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

USER: Can you please help me in booking my flight ticket from SFO to DFW?

ASSISTANT: Sure, we are ecstatic to help you. May I know on which dates you are willing to travel?

USER: My travelling dates are Apr 14 and Apr 16.

ASSISTANT: Do you need any flag stop in between journey?

USER: I need connecting flight.

ASSISTANT: May I know your good name please?

USER: Myself Jeffery Hall.

ASSISTANT: Is there any other specifications regarding your journey?

USER: I prefer my return ticket at evening time.

ASSISTANT: Ok, please wait a moment. let me search a flight for you.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights available at this moment matching your particulars.

USER: Thanks for your information.

ASSISTANT: Thanks for approaching us, wish you a great day.