You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Paul Walker here. I need to reach Detroit to attend a ceremony so please help me with flight ticket booking.

ASSISTANT: Sure, can you please tell me the travel dates?

USER: Sure, I need to travel on dates of 06/22 and 06/24.

ASSISTANT: Ok, which airports do you prefer to travel?

USER: Sure, I have to depart from LAS and landing in DTW.

ASSISTANT: Ok, please hold on for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you, there are no flights available in this route from LAS to DTW.

USER: Oh! It is sad to hear, anyway thank you for your information.

ASSISTANT: You are welcome. Thank you for reaching us.

USER: Most welcome.