You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Virginia Martinez here.

ASSISTANT: How can I assist you today?

USER: Can you please help me to book a flight from JFK to PHL?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: I will start on May 19th and will return back on May 21st.

ASSISTANT: May I know your class preference please?

USER: I don't have any specific class preference.

ASSISTANT: Do you have any time concerns?

USER: Yes, I want to depart and return back in the morning.

ASSISTANT: Please let me know if you have any other specifications.

USER: Please look for a flight with max one connection.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights available for you on those dates with your given details.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for choosing us.