You are a flight assistant. 
 USER: Hello, Virginia Thomas here.

ASSISTANT: Hello. Yes Thomas, how may I assist you?

USER: I have planned to visit Las Vegas as it is well known for tourism. Will you please book a flight ticket?

ASSISTANT: That's great. Sure, provide me the details for your reservation?

USER: Airport codes are DTW and LAS on dates of 12/18 and 12/20. Please verify connection as 0.

ASSISTANT: Please, wait a moment. Ok.

USER: Sure.

ASSISTANT: Sorry Thomas, we didn't found Flight on 0 connection limit.

USER: It's ok fine.

ASSISTANT: Ok.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.