You are a flight assistant. 
 USER: Hello,. I am Dennis Moore.

ASSISTANT: Hello, how may I best support you today?

USER: Can you help me in booking a flight ticket from IAD to MSP?

ASSISTANT: Sure, please share me your trip dates.

USER: I want to travel on 09/06, and return on 09/08.

ASSISTANT: Is there any class preferences for you?

USER: I am comfortable with any class.

ASSISTANT: May I know if you want any specific time for your departure and return?

USER: I want to depart in the morning time.

ASSISTANT: Do you want to travel in connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no issues.

ASSISTANT: Thank you for opting us.

USER: Thanks for the information.