You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Please book a flight ticket from PHX to DEN?

ASSISTANT: Sure, can you share your travelling dates?

USER: My journey dates are Mar 20 and Mar 22.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: I am Linda Roberts.

ASSISTANT: There is a connecting flight with number 1028 in airline Delta, the fare is 200 in economy class. Can I book it?

USER: Go ahead.

ASSISTANT: Your ticket is reserved, the depart time is 14:00 hours and return time is 10:00 hours.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.