You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: This is Jonathan Anderson. Could you please reserve my flight ticket from JFK to LGA?

ASSISTANT: Sure, May I know your journey dates?

USER: My depart will be on Mar 19th and arrive on Mar 21st.

ASSISTANT: Do you have any preferences?

USER: The depart time should be Morning. I need a flag stop.

ASSISTANT: Thanks for your details. There are no flights found on your data.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you.