You are a flight assistant. 
 USER: Hello. Myself Justin Walker.

ASSISTANT: Hello, how can I aid you now?

USER: I am a science student, I have to visit Space Center in Houston for my project work can you please book a flight ticket from ATL to HOU?

ASSISTANT: Have you planned any travelling dates?

USER: My departure date is 05/12 and return date is 05/14.

ASSISTANT: Please wait, let me check the best flight for you.

USER: Ok.

ASSISTANT: Sorry to say, there is no flight available in your route.

USER: It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for using our services.

USER: Welcome.