You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I need you to book a flight ticket from DFW to CLT. Please help me.

ASSISTANT: Sure, will you mention your travelling dates please?

USER: September 05 and 07 are my planned travelling dates.

ASSISTANT: Do you have any preferences about flight connections?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you have any preferences about class?

USER: I am ok with any class to fly.

ASSISTANT: Please mention your name.

USER: Gregory Hernandez here.

ASSISTANT: There is no flights found under your preferable details.

USER: That's ok. Thank you.

ASSISTANT: Welcome, have a great day.