You are a flight assistant. 
 USER: Hello. I am Timothy Martin.

ASSISTANT: Hello, how can I help you?

USER: I need to book a direct flight from SFO and It is a round trip. Could you please help me in booking a ticket?

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

USER: My travelling dates are 10/25 and return on 10/27.

ASSISTANT: Let me know your connection limit.

USER: I need a direct flight.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no flights found with your given dates.

USER: No worries, thank you for your service.

ASSISTANT: Thanks for choosing us.