You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

USER:  I am Samuel Smith. I would like to book a flight ticket to DFW from MSP. Can you please help me in flight reservation?

ASSISTANT: Sure, when are you willing to travel?

USER: My journey dates on 05/11 and 05/13.

ASSISTANT: Ok, any other requirements?

USER: I need a direct flight.

ASSISTANT: Ok, no flights found with your requested details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.