You are a flight assistant. 
 USER: Hello. I am Jacob Baker.

ASSISTANT: Hello, how may i help you?

USER: Can you please book a flight ticket from DFW to MSP?

ASSISTANT: Sure, may I know your trip dates please?

USER: Sure, I need to travel on dates of 08/19 and 08/21.

ASSISTANT: We regret to inform you that there are no flights found in your route with your planned dates of travelling.

USER: Oh! It is sad to hear. I need to choose another agency this time to reach Minneapolis. Anyway, thank you for your time.

ASSISTANT: Most welcome.