You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Michelle Baker.

ASSISTANT: How may I assist you?

USER: Can you help me for booking a flight ticket with single connection?

ASSISTANT: Sure, May I know your travelling dates please?

USER: My travelling dates are Sep 11 and Sep 13.

ASSISTANT: Can you please share your airport codes?

USER: My travelling airport codes are from IAD to JFK.

ASSISTANT: Please share if you want to travel in any specific time?

USER: My return time is evening.

ASSISTANT: May I know your connection limit please?

USER: I need a single connecting flight.

ASSISTANT: Wait a moment please. Michelle Baker, there are no flights available in your route.

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

ASSISTANT: Thank you for reaching us.