You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Mark Brown here. I want to attend a Marriage in Oakland. Can you please help me for booking the flight ticket?

ASSISTANT: Ok, please can you let me know the dates of your journey?

USER: My travelling dates are Oct 16 and Oct 18.

ASSISTANT: Ok, please provide me the airport codes of your origin and destination.

USER: My airport codes are BOS and OAK.

ASSISTANT: Ok, please let me know your connecting limits.

USER: I need single connecting flight.

ASSISTANT: Ok, please let me know your departure and arrival timings.

USER: I want to return on evening.

ASSISTANT: Ok, please let me know if you need any thing else.

USER: No, thank you.

ASSISTANT: Sorry, there are no flights available at your locations. Thank you for choosing our agency.

USER: Anyway, thanks for the information.