You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may  I help you?

USER: Can you please help me in booking a flight ticket from EWR to PHL?

ASSISTANT: May I know your travel dates?

USER: I would like to fly on May 19 and return on May 21.

ASSISTANT: Do you have any connecting limit preference?

USER: Yes, I need a single connection.

ASSISTANT: Is there any other concern?

USER: No.

ASSISTANT: May I know your name please?

USER: Myself Laura Smith.

ASSISTANT: No flights found as per your preferences at the moment.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.