You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Please book a ticket from IAD to PHL as I want to attend  a music festival.

ASSISTANT: Sure, We are here to address you.

USER: Thank you.

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are Sept 02 and Sept 04.

ASSISTANT: Do you need any break?

USER: Yes, I need a break.

ASSISTANT: May I know your name?

USER: My name is Edward Evans.

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

USER: No.

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

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for approaching us.