You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jennifer Wright here.

ASSISTANT: How can I help you?

USER: Can you book a flight ticket in my preferable travel dates Aug, 15 and Aug, 17?

ASSISTANT: Please provide your airport codes.

USER: LAX and HOU are my preferable airport codes.

ASSISTANT: Do you have any preferences?

USER: My return time should be at evening and prefer to travel in business class only.

ASSISTANT: Sorry, I did not find any flights for you.

USER: It's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.