You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Steven Roberts here.

ASSISTANT: Steven Robert, How can I assist you.

USER: I want to meet my friend on his birthday, can you please help me to book my flight ticket from EWR to DTW?

ASSISTANT: Sure, I will help you. May I know your travel dates?

USER: Sure, I will depart on 08/09 and return back on 08/11.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Steven, there is no flight available on your preferred travel dates.

USER: Not an issue, I will find an other way to reach my destination. Thank you for the information.

ASSISTANT: You are welcome, thank you for choosing us.