You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Jeffrey Lee.

ASSISTANT: Glad to meet you Lee.

USER: I have a business meeting in Washington. Can you help me for booking?

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

USER: My travelling dates are from 07/04 till 07/06.

ASSISTANT: Ok, may I know your airport codes please?

USER: My travelling airport codes are EWR and DCA.

ASSISTANT: Ok, hold on for a moment.

USER: Sure, take your time. Make sure that my connection limit should be 1.

ASSISTANT: Sorry Lee, there are no flights with single connection.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome.