You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Stephanie Mitchell. Can you please help me to book a flight ticket from LAS to DFW?

ASSISTANT: Sure, may I know your planned travel dates to check for the flight availability?

USER: My planned travel dates are Jan 23 to Jan 25.

ASSISTANT: Do you have any specifications?

USER: I would like to depart in the afternoon.

ASSISTANT: May I know your connection limit for this journey?

USER: I need a single connection of flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Ok, please wait for a while let me check for the flight availability?

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to say, there are no flights available for your desired timings.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.