You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Benjamin Parker.

ASSISTANT: What type of service you are looking from our agency?

USER: I am planning to visit Oakland OAK to meet my grandfather from DEN. Can you make a reservation for me?

ASSISTANT: Yes, I am happy to help you to reserve a flight ticket.Could you please provide me the travel dates?

USER: Thank you for accepting my request. I am planning to start my journey on Sept 30 and back on Oct 02.

ASSISTANT: Ok, how many connections do you need in between your journey?

USER: Yes, I need a one connection limit.

ASSISTANT: Sorry to inform you that, I have not found any flight availability in this route on the dates you have mentioned.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Most welcome. Thank you for consulting us.