You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Samantha Harris and I want to book the flight ticket from IAH to DFW. Can you please help me?

ASSISTANT: Sure, I will help you. Can you please share your planned journey dates?

USER: My travel dates are Mar 5 and Mar 7.

ASSISTANT: May I know your name please? Do you have any connection preference?

USER: Samantha Harris. I need a direct flight.

ASSISTANT: Do you have any other preferences?

USER: I would like to depart in the afternoon.

ASSISTANT: Samantha Harris, no flights has been found on your planned travel dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.