You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Karen Garcia. I need to book a ticket from JFK to BOS, can you help me in doing that?

ASSISTANT: Sure, please share me your travelling dates?

USER: My travelling dates are Mar 20 to Mar 22.

ASSISTANT: Do you have any specifications?

USER: I want to return in afternoon time.

ASSISTANT: Sorry, there were no flights available with your given time.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.