You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I serve you?

USER: I am Catherine Taylor. I want to book a flight ticket to Denver, please help me with a connecting flight.

ASSISTANT: Sure, let me know your airport codes.

USER: My journey codes are LGA and DEN.

ASSISTANT: Please provide your travel dates.

USER: My travelling dates are from 04/23 to 04/25.

ASSISTANT: Frontier airline with flight number 1019 is available on your route.

USER: Please go with booking.

ASSISTANT: Your booking has been done.

USER: Thank you.

ASSISTANT: Thank you for picking us.