You are a flight assistant. 
 USER: Hello,. I am Richard Green.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me in booking a flight ticket from SFO to LAS?

ASSISTANT: Sure, let me know your travelling dates.

USER: I want to travel on 12/22, and return on 12/24.

ASSISTANT: Can you please share your connection limit?

USER: I am comfortable with any connection.

ASSISTANT: Do you have any other requirements?

USER: I want to depart and arrive in afternoon time.

ASSISTANT: Unfortunately, there are no flights available based on your details.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing us.

USER: Thanks for the information.