You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Frank Walker. I am a science student. So, I want to conduct a science festival at Skeleton Museum Of Osteology at Chicago ORD? Could you please help me in booking a ticket with fare of 500?

ASSISTANT: Sure, we would be happy to help you.

USER: Thank you.

ASSISTANT: May I know your preferable dates to travel?

USER: My travelling dates are 12/20 and return on 12/22.

ASSISTANT: Ok, from which airport you are willing to travel?

USER: My take off airport code is PHX.

ASSISTANT: Ok, let me check the availability of flights on your route.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there is no flight available as per your details.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.