You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, good evening! How can I help you?

USER: I need you to book a flight ticket from JFK to PHL. Please help me.

ASSISTANT: Sure, I'm glad to help you. Can you please provide your planned departure and arrival travel dates?

USER: December 29 and 31 are my planned travelling dates.

ASSISTANT: How many stop overs are you expecting in between your journey?

USER: I need a break in between my journey.

ASSISTANT: Are you ok with economy or business class flight?

USER: I would prefer to fly in a economy class.

ASSISTANT: Please let me know if you have any other specifications, I'll search for the flights according to that.

USER: Nothing much to state.

ASSISTANT: Ok, can I have your good name please?

USER: My name is Emily Clark.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates with your given details.

USER: Thank you.

ASSISTANT: Thank you for choosing us, hope we will meet again.