You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am looking for a slight which travels from LAX to HOU. Can you please book a ticket?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Thank you. My trip dates are Aug 11 and Aug 13.

ASSISTANT: Do you have any preferences about flight connections?

USER: I am looking for a single connecting flight.

ASSISTANT: Do you have any preferences about class?

USER: No, thanks for asking.

ASSISTANT: Please mention your name.

USER: Sure, I am Mark Nelson.

ASSISTANT: There is no flights found under your preferable details.

USER: It's ok, thank you for searching the flights.

ASSISTANT: Welcome, have a great day.