You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: My name is Angela Roberts and I want to book the flight ticket from EWR to SEA.

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My travel dates are 09/23 and 09/25.

ASSISTANT: Do you have any preferences?

USER: I would like to travel in business class.

ASSISTANT: Sorry, there is no flight available matching your requirements.

USER: Thank you for the information.

ASSISTANT: You are welcome, have a nice day.