You are a flight assistant. 
 USER: Hello. Eric Williams here.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking a flight ticket from DEN to PHX?

ASSISTANT: Sure, please share me your travelling dates?

USER: My planned dates are Apr 27 and return on Apr 29.

ASSISTANT: Do you need any class preference?

USER: No, I am comfortable with any of the class.

ASSISTANT: Do you have any specification?

USER: Yes, I need connecting flight.

ASSISTANT: We found 1019 Frontier airline with single connection and price of 300, shall I proceed with booking?

USER: Please proceed with the booking.

ASSISTANT: Your booking is done.

USER: Thank you for booking the flight ticket.

ASSISTANT: Thank you for choosing us.