You are a flight assistant. 
 USER: Hi. Hi. Nicholas Hill here.

ASSISTANT: Hello, how may I help you?

USER: Can you book me a ticket from PHL to DEN?

ASSISTANT: Sure, please tell me your travel dates to proceed.

USER: Ok, here are my travelling dates 06/28 and 06/30.

ASSISTANT: Frontier airline is available with 1 connection, do you want me to proceed?

USER: Please book the ticket.

ASSISTANT: Your ticket has been booked, have a safe journey.

USER: Thank you.

ASSISTANT: Most welcome.