You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please book a ticket from PHL to LAS? As I have to attend a photo shoot.

ASSISTANT: Sure, may I know your good name?

USER: My name is Donald Moore.

ASSISTANT: When you are willing to travel?

USER: My planned departure and return travel dates are 11th and 13th of September.

ASSISTANT: Please share your connection limit.

USER: I need direct flight.

ASSISTANT: Is there any other preferences?

USER: No.

ASSISTANT: 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 choosing us.