You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I have planned to book a ticket from OAK to LAS, can you assist me in booking my ticket?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My preferred dates are Feb 3rd and Feb 5th.

ASSISTANT: May I know your name to proceed further?

USER: Robert Harris.

ASSISTANT: Do you have connecting limit?

USER: I need one connection between my trip.

ASSISTANT: Robert Harris, is there any specifications?

USER: Make sure that my return time must be evening.

ASSISTANT: Sorry Robert Harris, there is no flight in your route as per your request due to inflation.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for reaching us.