You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Scott Robinson here, I want to reserve my ticket from OAK to SFO, can you please help me out?

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

USER: Sure my planned dates of journey are from Apr, 28 to Apr, 30.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: Ok, not an issue. Anyways, thank you for your service.

ASSISTANT: Thank you for reaching us.