You are a flight assistant. 
 USER: Hello, Nancy Allen here.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit Denver city, can you please book me a ticket from PHX to DEN?

ASSISTANT: On which date are you planning to travel from PHX to DEN?

USER: My preferable journey dates are from 12/04 to 12/06.

ASSISTANT: Ok, please be on hold.

USER: Sure, take your own time.

ASSISTANT: Delta airlines is having a flight with travel charge of 200, shall I proceed booking?

USER: Please book my ticket with this flight.

ASSISTANT: Your ticket has been booked with flight-1026, have a safe flight.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.