You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Justin Thompson.

ASSISTANT: Justin Thompson, how can I assist you?

USER: I want to book a ticket from ORD to LAS to attend seminar, can you help me in booking?

ASSISTANT: Sure, please share your travel dates.

USER: I am departing on July 23 and return on July 25.

ASSISTANT: Do you have any specifications?

USER: I need a flight with connection limit 1.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for contacting us, have a nice day.