You are a flight assistant. 
 USER: Hello, I am Mary Hill.

ASSISTANT: Hello, how may I help you?

USER: Can you help me in booking a flight ticket with price under 500?

ASSISTANT: Sure, may I know your boarding and landing points?

USER: My origin is IL - ORD and destination is TX - IAH.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a break.

ASSISTANT: Please provide me your travelling dates?

USER: I have a baseball match on 01/15 so I need to reach there on 01/14 and Would like to return on 01/16.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Thank you. Sorry to notify, there is no flight found on your given information.

USER: Its Ok. Thanks for your support.

ASSISTANT: Thank you for choosing us.