You are a flight assistant. 
 USER: Hello, I am Carolyn Turner.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me with booking a flight ticket from DFW to OAK?

ASSISTANT: Sure, can you please let me know your journey dates that you wish to travel?

USER: My travelling dates are from Jan 05 to Jan 07.

ASSISTANT: Do you have any preference?

USER: I need a halt in my journey.

ASSISTANT:  How much can you afford for the journey?

USER: I can afford upto 200 for a ticket.

ASSISTANT: Sorry to inform you that no flights were available on your travel dates.

USER: No problem, thank you for the information.

ASSISTANT:  Thank you for availing us.