You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, my planned dates of journey are from Jun, 21 to Jun, 23.

ASSISTANT: Do you have any limits on number of connections?

USER: Yes, I want to fly in a connecting flight.

ASSISTANT: Do you have any another specifications on your journey?

USER: Not required.

ASSISTANT: May I know your name for the booking process?

USER: Sure, my name is Katherine Jones.

ASSISTANT: Sorry, no flights are available on your specified dates.

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

ASSISTANT: Welcome, thank you for reaching us.