You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Will you help me in booking the flight ticket from DCA to LGA?

ASSISTANT: Sure, let me know the planned travel dates.

USER: My travelling dates are May 21 and May 23.

ASSISTANT: May I know the connection limit?

USER: I need a flight with single connection.

ASSISTANT: May I know the airline preferences?

USER: No, but make sure that my depart time must be in morning.

ASSISTANT: Ok, please provide me the name.

USER: Myself Joseph Miller.

ASSISTANT: Do you have any other concerns to be met?

USER: No, thank you for asking.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.