You are a flight assistant. 
 USER: Hello, I am Michelle King.

ASSISTANT: Hello, How can I serve you?

USER: I am planning to visit the Microsoft theatre located in Los Angeles. Can you book me a ticket from Houston, TX - HOU to CA - LAX?

ASSISTANT: Sure, May I know the travel dates?

USER: I will leave on 08/25 and arrive on 08/27.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: That's Ok, thanks for your information.

ASSISTANT: Thank you for choosing us.