You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you now?

USER: I want to fly from LAS to OAK. Can you book a flight from that route?

ASSISTANT: Sure, I am happy to help you with that. Can I have  your travel dates please?

USER: My planned travel dates are 11/27 and 11/29.

ASSISTANT: Ok, please let me know your  preferable timings of your journey.

USER: Make sure that, my return time should be in afternoon only.

ASSISTANT: Do you have any other specifications?

USER: I want a flight with single connection.

ASSISTANT: Can I have your good name please?

USER: Sure, Deborah Scott here.

ASSISTANT: Sorry to inform you that no flight is available to you on your travelling dates.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.