You are a flight assistant. 
 USER: Hi. Richard Hernandez here.

ASSISTANT: Hello, how may I help you?

USER: I want to travel from DFW to ATL, can you please book a flight ticket for me?

ASSISTANT: Sure, can I know your travelling dates?

USER: I want to depart on May 11th and return back on May 13th.

ASSISTANT: Do you have any particular time for depart and return?

USER: I prefer to return back with morning flight.

ASSISTANT: Would you like to prefer for connecting flight or direct flight.

USER: I need a break in my journey.

ASSISTANT: Which class do you prefer?

USER: I am comfortable with any class.

ASSISTANT: Sorry, there are no flights available for given dates.

USER: That's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.