You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I need to travel from SFO to LGA, can you help me in doing that?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: My trip dates are June 28 to 30.

ASSISTANT: Ok, please let me know the timings of your journey.

USER: Please ensure that my depart time is afternoon.

ASSISTANT: Do you have any other specifications?

USER: I need a single connecting flight.

ASSISTANT: Can I have your good name please?

USER: I am Shirley Walker.

ASSISTANT: Sorry to inform you that no flight is available to you on your dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us, have  a good day.