You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: William Martinez here.

ASSISTANT: How can I help you?

USER: I have to attend a wedding, can you book a ticket from JFK to BOS?

ASSISTANT: Sure, I am gleeful to help you. May I know your travelling dates?

USER: Sure, my planned departure and return travel dates are 10th and 12th of October.

ASSISTANT: May I know your connection limit?

USER: I don't have connection preference.

ASSISTANT: Is there any class preference?

USER: I'm ok with any class.

ASSISTANT: Do you have any specifications?

USER: Yes, I want to return in the evening time.

ASSISTANT: Sorry, there are no flights found on your travel dates.

USER: Oh! That's ok, thank you anyways.

ASSISTANT: Thank you for reaching us.