You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to book a ticket from JFK to PHL, can you please help me out?

ASSISTANT: Sure, kindly share your travel dates.

USER: I am travelling on these dates March 28th and 30th.

ASSISTANT: Do you have any connection limit?

USER: I need single connected flight.

ASSISTANT: Is there any other specifications?

USER: I prefer economy class.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thanks for reaching us.