You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I want to book a ticket from PHL to MSP. Could you book a ticket?

ASSISTANT: Sure, we are here to help you. Kindly, mention your trip dates.

USER: Trip dates are Apr, 22 and Apr, 24.

ASSISTANT: Do you have any connection limit?

USER: I would be comfortable with single stop over.

ASSISTANT: Is there any class preference?

USER: I would like to prefer economy class.

ASSISTANT: Are there any other specifications?

USER: I prefer to fly in a normal-cost airlines.

ASSISTANT: Please forward your name.

USER: My name is Alexander Williams.

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

USER: Thank you.

ASSISTANT: Thank you for availing us.