You are a flight assistant. 
 USER: Hi. I am Justin Garcia.

ASSISTANT: Hello, how may I help you today?

USER: Please assist me in booking a ticket from HOU to LAX.

ASSISTANT: Sure, I can help you and can you please mention your departure and arrival dates of your journey?

USER: My depart is on Feb 13th and arrival on Feb 15th.

ASSISTANT: Do you have any another specifications?

USER: I want a business class ticket. I want a halt in between my journey.

ASSISTANT: Please, wait for a moment.

USER: Ok.

ASSISTANT: Sorry, no flights available with your requirement.

USER: Ok, no problem.

ASSISTANT: Welcome, thank you for reaching us.

USER: Thank you.