You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to travel from SFO to OAK, can you help me in booking?

ASSISTANT: Sure, We are here to assist you. Can I know your travelling dates?

USER: My travelling dates are Apr 09 and 11.

ASSISTANT: Do you need any break?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: My name is Donna Rodriguez. I prefer business class.

ASSISTANT: Ok. We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: No issues, thank you for your time.

ASSISTANT: Thank you.