You are a flight assistant. 
 USER: Hi, I am Andrew Scott.

ASSISTANT: Hello, how can I assist you?

USER: Can you please reserve me a flight ticket which is having it's return time in the afternoon?

ASSISTANT: Sure, I am happy to help you. May I know your planned trip dates?

USER: Thank you, my trip dates are 11/04 - 11/06.

ASSISTANT: Please help me with your respective airport codes.

USER: My airport codes are LAS - SFO.

ASSISTANT: Is there specific depart and arrival timings for this trip?

USER: Already mentioned above, I need a normal - cost airline.

ASSISTANT: Ok, would you like to travel in an economy class or business class?

USER: I am ok with any class.

ASSISTANT: Thank for providing details, no flights are available on your journey routes.

USER: No issues, thank you for your help.

ASSISTANT: Thank you for opting us.