You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you today?

USER: I am Shirley Phillips. I would like to book a flight ticket to attend a robotic workshop, can you help me to book a direct  flight'?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are PHL and JFK.

ASSISTANT: Ok, provide your travelling dates.

USER: My travelling dates are 11/15 and 11/17.

ASSISTANT: Ok, do you have any other requirements?

USER: I want to return at evening.

ASSISTANT: There are no flights found on your requested dates.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for reaching us.