You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to visit my grand parents. So could you please book a ticket from AUS to DFW.

ASSISTANT: Sure, may I know the planned travel dates?

USER: My travel dates are as follows May 12 and May 14.

ASSISTANT: Do you have any specifications?

USER: I would like board a direct flight with normal cost.

ASSISTANT: Please provide me the name to reserve the ticket.

USER: This is Jacob Hall.

ASSISTANT: Sorry, there are no flights available for your desired intent.

USER: No issue, thank you for the help.

ASSISTANT: Thank you for reaching us.