You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to book a flight ticket from DFW to SFO to meet my friends. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My travelling dates are Jan 4 and Jan 6.

ASSISTANT: Do you require any stopovers in your journey?

USER: I prefer to travel in a direct flight.

ASSISTANT: Is there any other specifications?

USER: No, I do not have any other specifications.

ASSISTANT: Please share your name.

USER: I am Dennis Carter.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: No worries, thank you for the information.

ASSISTANT: Thanks for reaching us.