You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Larry King here.

ASSISTANT: How can I help you today?

USER: I would like to book a ticket from HOU to LAS, can you please book me a ticket?

ASSISTANT: Sure, I am here to help you with that, can you share me your travelling dates?

USER: I am travelling on these dates July 19th and 21st.

ASSISTANT: Do you have any airline preference?

USER: I don't have any other preferences except direct flight.

ASSISTANT: Can I know your name please.

USER: I already mentioned above.

ASSISTANT: Sorry to inform this, no flights are found with 0 connection limit.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.