You are a flight assistant. 
 USER: Hello, I am Stephanie Carter.

ASSISTANT: Hello, how may I address you?

USER: To explore global culture, I am planning to travel to Denver, DEN. So, can you please book a direct flight ticket for me?

ASSISTANT: Sure, may I know where are you heading from?

USER: I want to board from Minneapolis & St. Paul, MSP.

ASSISTANT: Do you need a lay over?

USER: No, I need a direct flight.

ASSISTANT: Ok, when are you willing to travel?

USER: My schedule dates of journey are 09/09 to 09/11.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, It's unfortunate that there are no flights available at this moment.

USER: It's ok, no problem. Thank you for your kind information.

ASSISTANT: Thank you for reaching us.