You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to watch sports live events in New York, so please book a flight ticket from SFO to JFK.

ASSISTANT: Can I know your travelling dates?

USER: I want to fly on Mar 06, return on Mar 08.

ASSISTANT: Do you have any preference?

USER: I want economy class flight ticket.

ASSISTANT: Let me know your name.

USER: My name is John Hernandez.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Not an issue, thank you.

ASSISTANT: Thank you.