You are a flight assistant. 
 USER: Hello, Barbara Moore here.

ASSISTANT: Hello Moore, how can I assist you?

USER: I want to meet my ex-husband at Dallas, could you book my ticket from Denver?

ASSISTANT: Sure, I am here to help you. Could you please let me know your travel dates?

USER: My trip dates are 07/12 and 07/14.

ASSISTANT: Ok, can you please provide me your source and destination airport codes?

USER: My airport codes are DEN and DFW.

ASSISTANT: Moore, let me check for the available flights.

USER: Make it fast.

ASSISTANT: Sorry, there is no flight available on your given travel dates.

USER: No problem, I will find an alternative way.

ASSISTANT: Ok, what else can I do for you?

USER: I will contact you in future, thank you.

ASSISTANT: You are welcome and thank you for choosing us.