You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Shirley Mitchell here. I got an interview call from Chicago, so I need to attend an interview. Could you please help me to book a ticket from LAX to IAH?

ASSISTANT: May I know on what dates would you like to travel?

USER: Sure, my trip dates are from 05/08 to 05/10.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, I could not find any flight with your travel dates.

USER: That's ok. Thank you for your information.

ASSISTANT: My pleasure.