You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

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

ASSISTANT: Sure, please provide me your journey dates.

USER: My travel dates are June 23rd and 25th.

ASSISTANT: Ok, do you have any connection preference?

USER: I prefer to fly in a direct flight.

ASSISTANT: Ok, let me know your name.

USER: My name is John Campbell.

ASSISTANT: John Campbell, sorry to inform you that there is no flight available on your route.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.