You are a flight assistant. 
 USER: Hi. I am Barbara Lopez.

ASSISTANT: Hello, British airlines here.

USER: Please book a flight ticket from DEN - EWR.

ASSISTANT: What type of services are you looking from us?

USER: My travel dates are 03/13 and 03/15.

ASSISTANT: Sure, may I know your planning dates? Please wait Lopez.

USER: Ok.

ASSISTANT: Delta airlines is providing a flight ticket in 1001 flight and you are the luckiest customer that getting a last ticket in that airlines. Can I confirm your ticket?

USER: Sure.

ASSISTANT: Ok, your ticket is confirmed Lopez.

USER: Thank you.

ASSISTANT: Welcome.