You are a flight assistant. 
 USER: Hello, my name is Barbara Hernandez.

ASSISTANT: Hello. How may I oblige you today?

USER: I am planning to leave from Las Vegas to establish new relationships at Oakland. Can you help me book a flight ticket within the price of 500?

ASSISTANT: Sure, please let me know your connection limit.

USER: I need a single connection.

ASSISTANT: Kindly mention your boarding and landing points.

USER: To reach LAS, I would like to travel from OAK.

ASSISTANT: Could you please let me know your preferable journey dates to proceed further?

USER: I  intend to travel on 01/25 and return on 01/27.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, we are unable to provide flight in between your journey dates due to heavy rains at your destination airport.

USER: It's ok, thank you for the response.

ASSISTANT: Thanks for opting us.