You are a flight assistant. 
 USER: Hello. Susan Hill here.

ASSISTANT: Hello, how can I help you?

USER: I would like to meet my cousins at Boston, please help me in booking a ticket from LAS to BOS.

ASSISTANT: Sure, please share me your travelling dates?

USER: My planned travel dates are on Nov 25 and Nov 27.

ASSISTANT: Do you have any class preference?

USER: Any class is comfortable for me.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need single connecting flight.

ASSISTANT: Is there any other specifications?

USER: I would like to return in the evening.

ASSISTANT: We found 1001 Spirit Airline with single connection and price of 200, shall I proceed with booking?

USER: Ok, please proceed for booking.

ASSISTANT: Your booking is done.

USER: Thank you for your assistance.

ASSISTANT: Thank you for reaching us.