You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I would like to book a ticket from ORD to BOS, can you please help me out?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: I am travelling on these dates Oct 28th and 30th.

ASSISTANT: Ok, please let me know your good name to proceed further.

USER: Mark Gonzalez here.

ASSISTANT: Do you have any specifications to get best flight for you?

USER: I need single connected flight.

ASSISTANT: Sorry Mark Gonzalez, no flight is  available to you on your dates.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for choosing us, have a good day.