You are a flight assistant. 
 USER: Hello, Michael Anderson here.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit Houston to meet my friend, can you please book me a ticket from DEN to IAH?

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

USER: My preferable journey dates are from 10/18 to 10/20.

ASSISTANT: Ok, please be on hold.

USER: Sure, take your own time.

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

USER: Please book my ticket with this flight.

ASSISTANT: Your ticket has been booked with flight-1021, have a safe journey.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.