You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Helen Lewis. Can you help me in booking on 10/26 to 10/28, as there is a tennis match?

ASSISTANT: Can I know your desired airport codes please?

USER: My source is DCA and destination is ORD. I need a connecting flight.

ASSISTANT: There is no flight on your desired travel dates, there is no flight with connection limit 1.

USER: No issue, I will go with some other alternative. Thank you for checking.

ASSISTANT: Thank you for opting us.