You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: I want to book a ticket from LAX to HOU, can you help me?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travel dates are Feb 26 and 28.

ASSISTANT: Do you have any airline preferences?

USER: No.

ASSISTANT: Do you have any class preferences?

USER: I want to travel in economy class.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I need a direct flight.

ASSISTANT: Can you please provide your name to proceed further?

USER: I am Gary Martinez.

ASSISTANT: Sorry, there are no flights available at your request.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for contacting us, have a nice day.