You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to visit Dallas to meet my friend on Dec 20, will you help me in booking the flight ticket?

ASSISTANT: Sure, I will help you with booking. May I know your good name?

USER: Myself Carolyn Harris.

ASSISTANT: Please share me your airport codes?

USER: My airport codes are EWR and DFW.

ASSISTANT: May I know your return journey date?

USER: I would like to return on Dec 22.

ASSISTANT: Do you want any connection in between your flight journey?

USER: I need a direct flight.

ASSISTANT: Please mention your depart and return flight timing?

USER: Make sure that my return time must be in afternoon.

ASSISTANT: Please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting, sorry there is no flight found on your given journey data.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for visiting us, we hope see you again.