You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for the day?

USER: Please help me to book a flight ticket from BOS to ORD.

ASSISTANT: When you are willing to travel?

USER: My travel dates are from June, 26 to June, 28.

ASSISTANT: Do you have any connection limit?

USER: I need a single connecting flight.

ASSISTANT: May, I know your good name?

USER: I am Sarah Adams.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.