You are a flight assistant. 
 USER: Hello, I am Virginia Baker.

ASSISTANT: Hello, how can I help you today?

USER: I need to attend an interview in Space Center in Houston, HOU. Can you please reserve me a flight ticket?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you please provide me your travel dates.

USER: My travelling dates are, 08/06 and 08/08.

ASSISTANT: May I know your take off airport code?

USER: My take off airport is Los Angeles, LAX.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: Ok, no problem at all.

ASSISTANT: Thanks for reaching us.

USER: Thank you for your information.