You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Helen Robinson.

ASSISTANT: Helen Robinson, how can I aid you today?

USER: I have to attend a cultural event at New York, can you help me to book a flight ticket from LGA to EWR?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My travelling dates are 29 Sep and 01 Oct.

ASSISTANT: Ok, do you have any specifications?

USER: I would like to return in the afternoon with a connecting flight.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure, take your own time.

ASSISTANT: Sorry Helen Robinson, there are no flights available on your requested dates.

USER: It's ok, not a problem, thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.