You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Can you avail me to book a flight from DFW to OAK?

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

USER: My travel dates are July 31 and Aug 02.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a connecting flight.

ASSISTANT: Do you have any another specifications on your journey?

USER: I want to depart in the morning time.

ASSISTANT: May I know your name for the booking process?

USER: Donald Jackson.

ASSISTANT: Sorry, no flights are available on your required dates.

USER: Ok, thank you.

ASSISTANT: Welcome, thank you for reaching us.