You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How could I aid you today?

USER: I want to reserve my ticket from OAK to LAS to attend my sister's marriage, can you please help me in booking?

ASSISTANT: Sure, can I have your travelling dates please?

USER: Sure, my planned dates of journey are from Sep, 25 to Sep, 27.

ASSISTANT: Is there any restrictions in an airline preferences?

USER: No, I want to fly in a connecting flight.

ASSISTANT: Do you need any connection limit in between your journey?

USER: I am ok with single connecting flight.

ASSISTANT: May I know your name please?

USER: Sure, my name is Jason Davis.

ASSISTANT: Unfortunately there is no flight found with your given information.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Anyways, thank you for your service.