You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Donald Harris. Can you please book a ticket from LAS to LGA to attend Sports festival?

ASSISTANT: Sure, can you please share your travel dates?

USER: My travelling dates are Sept 7 and Sept 9.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I want one connection.

ASSISTANT: Do you have any other specification that you are looking for?

USER: My depart time is morning and return time is evening.

ASSISTANT: Donald Harris, I am sorry to inform you that there is no flight available at your request.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you for contacting us.