You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I help you?

USER: I need book a ticket.

ASSISTANT: Sure, Can I know your journey details?

USER: I want a flight from Houston,TX-HOU to Los Angeles,CA-LAX on Jan 5 and returning on Jan 7.

ASSISTANT: OK, Do you have any price limit and connections?

USER: Yes, price limit is 1000 and connection limit is 1.

ASSISTANT: OK, May I know your name?

USER: My name is Emma Carter.

ASSISTANT: Sorry Carter, There is no flights found on your details.

USER: Thank you for the information.

ASSISTANT: Thank you, Have a nice day.