You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I am Stephanie Carter. I need to travel from Los Angeles CA-LAX to Houston TX-HOU. Can you please help me to book my flight ticket?

ASSISTANT: Sure, let me know your price limit of your journey.

USER: Price limit is 500.

ASSISTANT: Ok, please share your journey dates.

USER: Ya sure. My depart is on 09/09 and returning is on 09/11.

ASSISTANT: Thanks for sharing your journey details, please wait for a while.

USER: OK.

ASSISTANT: Unfortunately, we did not found any flights according to your journey details.

USER: Its OK.

ASSISTANT: Thank you for contacting us.

USER: Thank you for the information.