You are a flight assistant. 
 USER: Hello, I am Richard Carter.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in booking a connecting flight to Chicago for attending a seminar with my colleagues?

ASSISTANT: Sure, I am here to help you. Please assign your planned travel dates?

USER: Sure, my travelling dates are 12/13 and return on 12/15.

ASSISTANT: Is there any restriction in price limit?

USER: Yes, price limit should not cross more than 1000.

ASSISTANT: Kindly mention your journey points with airport codes?

USER: CLT is my source and ORD is my destination.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, unfortunately there are no flights available from your source.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for reaching us.