You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Cynthia Miller.

ASSISTANT: How can I help you today?

USER: Can you help me for booking a flight ticket from OAK to ATL to meet my friend?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My travelling dates are Apr 11 and Apr 13.

ASSISTANT: May I know your departure time and arrival time?

USER: My departure time is evening.

ASSISTANT: Do you have any specification?

USER: I need a single connecting flight.

ASSISTANT: Sorry, no flights are available on your particular travel dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Welcome.