You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Jack Scott. Can you please book a flight ticket from DTW to EWR?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, I need to travel on dates of June 17 and June 19.

ASSISTANT: At what time do you like to travel?

USER: I would like to return in morning time so please check with that.

ASSISTANT: Sorry, there is no flight on your details.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you.