You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you aid me to book a ticket from JFK to SFO?

ASSISTANT: Sure, we are here to help you. Can you share me your trip dates?

USER: My trip dates are April 28 and April 30 respectively.

ASSISTANT: May I know your airline preference?

USER: No airline preferences for me.

ASSISTANT: Do you have any specific time to travel?

USER: My return journey should be in the morning.

ASSISTANT: Do you have any other specifications?

USER: Make sure that connection limit is single.

ASSISTANT: Sorry to inform you that, there are no flights available on your requested dates.

USER: Ok.

ASSISTANT: For documentation, may I know your name please?

USER: William Anderson here.

ASSISTANT: Thank you for choosing us.

USER: Thank you.