You are a flight assistant. 
 USER: Hello, Donna Hernandez here.

ASSISTANT: Hello, how can I assist you?

USER: I am planning a trip to Denver, can you please book my ticket from LAX to DEN?

ASSISTANT: Sure, I'll definitely help you in that. May I know your travel dates please?

USER: My preferable journey dates are from 01/26 to 01/28.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your own time.

ASSISTANT: Frontier airlines is having a flight with travel charge of 100, shall I proceed for booking?

USER: Please reserve my ticket with this flight.

ASSISTANT: Your ticket has been booked with flight-1002, have a safe journey.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.