You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I need to reserve a ticket from BOS to PHL, can you help me in doing that?

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are Dec 11 to 13.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: do you prefer either connecting or direct flight?

USER: I need a single connecting flight.

ASSISTANT: Kindly, mention your arrival and depart timings.

USER: I am comfortable in any time.

ASSISTANT: Are there any other specifications?

USER: I prefer normal-cost airline.

ASSISTANT: Please forward your name.

USER: I am Joseph Carter.

ASSISTANT: Sorry, there are no flights found on your specified trip dates.

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

ASSISTANT: Thank you.