You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Myself Helen Turner, can you please reserve flight ticket from OAK and LGA?

ASSISTANT: Sure, kindly share your travel dates.

USER: My travelling dates are July,11 and July,13.

ASSISTANT: Do you have any connection preference?

USER: I need a single connection for my travel.

ASSISTANT: Is there any other specifications?

USER: My depart time should be in the afternoon.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: That's ok, I will choose any other source to reach my destination.

ASSISTANT: Thanks for reaching us.