You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Robert Davis here, I am planning to travel from ORD to LGA. Can you please help me to book a ticket?

ASSISTANT: Ok, may I know your travel dates?

USER: My travelling dates will be on 04/10 to 04/12.

ASSISTANT:  Do you have any preference?

USER: I need a connecting flight.

ASSISTANT: Sorry to notify you that no connecting flights are available on your travel dates.

USER: Ok, not an issue. Thank you.

ASSISTANT:  Thank you for availing us.