You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am looking for a direct flight from SFO to BOS, can you please book my flight ticket?

ASSISTANT: Can I know your travelling dates?

USER: Thank you. I will depart on Dec 27th and return back on Dec 29th.

ASSISTANT: May I know your connecting limit?

USER: I prefer for a direct flight.

ASSISTANT: Do you have any other preference?

USER: No.

ASSISTANT: May I know your name please?

USER: My name is Matthew Wright.

ASSISTANT: Sorry, no flights available on your route.

USER: Not an issue. Thank you for checking.

ASSISTANT: Thank you for reaching us.