You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carolyn Walker.

ASSISTANT: How may I assist you?

USER: I am planning to book a ticket from OAK to LAX. Can you please help me out to book a flight ticket?

ASSISTANT: Yes, I can help you. Can you share me your dates of travel?

USER: I would like to travel on 03/15 and return back on 03/17.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: That's fine. Thank you for your service.

ASSISTANT: Thank you for reaching us.