You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I'm planning to attend for seafood festival, can you please book the ticket from OAK to SEA?

ASSISTANT: Sure, we are glad to help you you in booking. Please share your planned travelling dates to proceed further.

USER: Sure, my planned departure and return travel dates are 14th and 16th of July.

ASSISTANT: Are you okay with connecting flight or you need a direct flight?

USER: I prefer single connected flight to travel.

ASSISTANT: May I know your name please?

USER: My name is Charles Robinson.

ASSISTANT: Is there any other preferences that you would like to add before booking?

USER: No.

ASSISTANT: Let me check the availability of flights and revert to you.

USER: Sure, take your own time.

ASSISTANT: Thank you for waiting, we are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for approaching us.