You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Please  book me a ticket from MSP to DFW to meet my old friends.

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: I would like to leave on Apr 11th and return on Apr 13th.

ASSISTANT: Can I have your good name please?

USER: My name is Brandon Lee.

ASSISTANT: May I know your airline preference please?

USER: I prefer normal cost airline.

ASSISTANT: Do you prefer halt in between your journey?

USER: No, I want direct flight.

ASSISTANT: Please let me know if you have any other specifications.

USER: I would like to return at evening time.

ASSISTANT: Thank you for giving the information and I'm sorry to inform you that there are no flights available for you on those dates with your given details.

USER: Ok, not an issues. Any way thank you.

ASSISTANT: Thank you for choosing us.