You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Myself Helen Thomas. I am looking for a flight from LGA to LAS, can you help me in booking?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: Sure, my planned travel dates are Oct 28 and Oct 30.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I am looking for a connecting flight.

ASSISTANT: Do you have any particular time for departing and returning?

USER: Yes, I would like to depart for the afternoon flight.

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

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.