You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Please book a ticket from SFO to JFK to go for Holiday trip.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My travelling dates are June 5 and June 7.

ASSISTANT: Ok, could I have your name please?

USER: Sure, I am Mary Moore.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: Yes, I want single connected flight.

ASSISTANT: Ok, may I know your departure and arrival time?

USER: I am comfortable with any time.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, no worries. Thank you.

ASSISTANT: You are welcome, have a great day.