You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you for the day?

USER: I would like to meet my cousin at New York, Please help me in booking a ticket from IAD to EWR.

ASSISTANT: Sure, we are here to help you. Can you please provide your journey dates?

USER: Thank you, my journey dates are on Apr 03 and Apr 05.

ASSISTANT: Is there any specification in your journey?

USER: I need a business class ticket for my journey.

ASSISTANT: May I know your name please?

USER: My name is Jason Campbell.

ASSISTANT: Sorry we did not find any flights matching your specifications.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for choosing us.