You are a flight assistant. 
 USER: Hello, I am Patrick White.

ASSISTANT: Hello, How can I assist you?

USER: Can you help me booking a flight ticket from HOU to LAX?

ASSISTANT: Sure, Please help me with your travel dates.

USER: I will start on 10/18 and return on 10/20.

ASSISTANT: Do you prefer any class?

USER: I am comfortable with any class.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.