You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I want to reserve my ticket from BOS to OAK to visit Oakland, can you please help me in booking?

ASSISTANT: Sure, May I know the travelling dates?

USER: Sure, my planned dates of journey are from Jan, 16 to Jan, 18.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: Is there any other requirements?

USER: Yes, I want to return at evening time.

ASSISTANT: May I know your name?

USER: Sure, my name is Thomas Jackson.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for opting us.