You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Joshua Martinez.

ASSISTANT: Joshua Martinez, how may I aid you?

USER: I am looking to book a flight ticket to meet my friend in Minneapolis. Can you help me for booking a flight ticket from DTW to MSP?

ASSISTANT: Sure, please provide your trip dates.

USER: My travelling dates are Feb 04 and Feb 06.

ASSISTANT: Do you have any specifications?

USER: My return time is evening.

ASSISTANT: Do you have any preferences?

USER: I need a direct flight in my journey.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: Welcome.