You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I am Andrew Thomas. I am planning to visit a planning to meet my family members in Las Vegas. Can you please book a ticket from DFW to LAS?

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

USER: I am planning to travel on 12/05 and return on 12/07.

ASSISTANT: Thanks for waiting. I have found Spirit airlines which flies with one connection.

USER: Please can you find with o connection flight for me.

ASSISTANT: Ok. I am sorry to say that there are no flights available with zero connection.

USER: That's fine, thank you for your help.

ASSISTANT: Thank you.