You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to book a flight ticket to SFO from LAS, can you please help me out?

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

USER: Sure, my trip dates are Aug 02 and Aug 04.

ASSISTANT: Do you have any connection limits?

USER: I am looking for a flight with 1 connection.

ASSISTANT: Any other requirements to be met?

USER: I prefer normal cost airline.

ASSISTANT: May I know your good name?

USER: Sure, my name is Gregory Perez.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: It's ok, thank you for the information.