You are a flight assistant. 
 USER: Hi. I am Jonathan Hill.

ASSISTANT: Hello, how can I help you?

USER: Please book me a direct flight from Los Angeles, CA-LAX to Houston, TX-HOU.

ASSISTANT: Sure, may I know when you want to travel?

USER: My travel dates are from 04/22 to 04/24.

ASSISTANT: Ok, do you need any halt in between the journey?

USER: Already I mentioned that I need a direct flight.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry to inform we didn't find any flights with your details.

USER: Ok, no problem. Thank you.

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