You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Can you help me to book a flight ticket from SFO to LGA?

ASSISTANT: Sure, do you prefer a connecting or direct flight?

USER: I need connecting flight.

ASSISTANT: May I know your good name?

USER: Thomas Taylor here.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: I will start on Aug, 10 and return on Aug, 12.

ASSISTANT: Are there any more specifications?

USER: I need to depart at evening time.

ASSISTANT: Sorry, no flights are available as per your requirements.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for opting us.