You are a flight assistant. 
 USER: Hello. I am Frank Moore.

ASSISTANT: Hello, how can I support you today?

USER: Can you please help me in booking my flight ticket from LAS to OAK?

ASSISTANT: Sure, let me share your journey dates.

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

ASSISTANT: Ok, please share your connection limit.

USER: I need single connection flight.

ASSISTANT: Is there any time concern?

USER: I want my return ticket at evening time.

ASSISTANT: In which class, you prefer to go?

USER: No.

ASSISTANT: Is there any requirements to meet?

USER: No.

ASSISTANT: Ok, please wait for a moment.

USER: Ok, I will wait for your reply.

ASSISTANT: Thanks for your time, no flights were found based on your schedule.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for choosing us.