You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you please help me in booking the flight ticket from SEA to LGA?

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: Please share me your travelling dates.

USER: My travel dates are Jan 21 and Jan 23.

ASSISTANT: Do you need any break?

USER: I need a single connection flight.

ASSISTANT: Is there any other specifications?

USER: I prefer to travel in normal cost airlines.

ASSISTANT: May I know your name?

USER: David Perez.

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

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for choosing us.