You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in booking a flight ticket from Seattle, SEA to reach Dallas, DFW?

ASSISTANT: Sure, may I know your to and fro dates to proceed further please?

USER: My journey dates are from May 01 to May 03.

ASSISTANT: Do you have any specific time preference to board and return?

USER: I am ok with any time.

ASSISTANT: May I know which class do you prefer to travel?

USER: I prefer to travel in business class flight.

ASSISTANT: Is there any other preference you have for this journey?

USER: Yes, I need a break in between journey.

ASSISTANT: Sure, please share your name to move forward with the booking.

USER: My name is Rachel Johnson.

ASSISTANT: We don't have any business class seat left in our flights on your route.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you.