You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what help is required from end?

USER: I would want to book a flight early June for my Friend's graduation.

ASSISTANT: I can help you with that. Can you mention the trip dates please?

USER: Yes, Its from June 6-8.

ASSISTANT: May I know the take off and landing codes please?

USER: Its from HOU to DCA.

ASSISTANT: May I know your name for booking a ticket?

USER: Its Deborah Evans. could you please make sure the return is during the afternoon time?

ASSISTANT: Give me a moment I will get back to you.

USER: Sure. Take your time.

ASSISTANT: Sorry, there are no flights as per your request.

USER: Thanks for the update. Have a good day!!!.

ASSISTANT: Thank you for reaching us.