You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: William Gonzalez here.

ASSISTANT: William, what can I do for you today?

USER: I need to book a ticket from SEA to EWR.

ASSISTANT: Ok, please provide me your travelling dates.

USER: My travelling dates are from 02/04 to 02/06.

ASSISTANT: Ok, please wait.

USER: Make sure that there is 0 connection limit.

ASSISTANT: Ok, let me check. Sorry William, there is no flight available at your requested dates.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for contacting us.Have a good day. Welcome.