You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Please help me in booking a ticket from LAS to DFW as I need to attend a seminar in my college.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travel dates are Jan 26 and Jan 28.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Your good name please.

USER: My name is Jennifer Brown.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for reaching us.