You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Sharon Anderson. Can you please help me in booking a flight ticket from OAK to LAS?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: I would like to fly on Oct 21 and return on Oct 23.

ASSISTANT: May I know your connection limit please?

USER: I need a single connection.

ASSISTANT: Please share if you want to travel in any specific time?

USER: I would like to return in the evening time.

ASSISTANT: Wait a moment please.

USER: Ok.

ASSISTANT: Sharon Anderson, there are no flights available in your route.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.