You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please book a ticket from ORD to LAS to attend an interview?

ASSISTANT: Sure, can you share your trip dates?

USER: My travelling dates are Mar 9 and Mar 11.

ASSISTANT: Do you have any connection limit?

USER: I want single connection.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Are there any other requirements?

USER: I don't have any other preferences.

ASSISTANT: Please forward your name.

USER: I am Justin Thompson.

ASSISTANT: There are no flights found on your specified trip dates.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you.