You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I want to travel from SFO to LAX for my business conference, can you please help me out?

ASSISTANT: Sure, I will aid you with that. Can you please mention your preferable travel dates?

USER: Thank you, my departure is on Sept 21 and please book my return ticket on Sept 23.

ASSISTANT: May I know your name for further process?

USER: Sure, my name is Jennifer Allen.

ASSISTANT: Do you have any preferences regarding timings of your journey?

USER: I need a connecting flight.

ASSISTANT: Do you have any another specifications?

USER: No.

ASSISTANT: Ok, please hold on a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Oh! Sad to hear that. Anyway, I will find another alternative. Thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: Welcome.