You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you now?

USER: I am Richard Taylor. I would like to visit the California Academy of Sciences. This is the most visited museum in Chicago ORD. Could you please help me in booking a ticket with fare of 500?

ASSISTANT: Let me know your source point.

USER: My source point is Boston BOS.

ASSISTANT: Can I have your starting date of journey?

USER: My starting date is 05/14.

ASSISTANT: Any connection limit you have?

USER: I need a connection.

ASSISTANT: When will you return?

USER: My returning date is 05/16.

ASSISTANT: Thanks for sharing your details with patience. Unfortunately, there were no flights available in your route.

USER: No problem,thank you for your information.

ASSISTANT: Thank you for choosing us.