You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you today?

USER: Can you please reserve a flight ticket with the name of Daniel King as I am planning to go for Brooklyn walking tour at New York, LGA along with my fiance?

ASSISTANT: Sure, I will help you with that. When are your planned travel dates?

USER: My scheduled dates of journey is 04/18 to 04/20.

ASSISTANT: May I know your boarding point?

USER: I would like to fly from Oakland, OAK.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We regret that, there is no flight found in search to your route on your dates of journey.

USER: It's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.