You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Myself Angela Allen, I would like to travel IAD from EWR, can you help me in booking my ticket?

ASSISTANT: Sure, may I know the travelling dates?

USER: My departure dates is on 06/21 and return on 06/23. Please make sure that the connection limit should be 0.

ASSISTANT: Sorry, no flights found as per your connection limit.

USER: No problem, thank you for checking.

ASSISTANT: Thank you.