You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Barbara Lopez.

ASSISTANT: How can I aid you?

USER: I planned to meet my cousin in BOS, can you please help me to book a flight ticket from EWR?

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

USER: I planned to start on 07/17 and return back on 07/19.

ASSISTANT: Barbara Lopez, there are no flights available in your route.

USER: Ok, not an issue.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.