You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist today?

USER: Can you please help me with booking a flight ticket from JFK to IAD?

ASSISTANT: Sure, may I know your name?

USER: My name is Helen Gonzalez.

ASSISTANT: When do you want to travel?

USER: My travel dates are Oct 15 and 17.

ASSISTANT: Do you prefer economy or business class?

USER: I prefer business class.

ASSISTANT: Do you have any specification?

USER: I would like to return at afternoon.

ASSISTANT: Sorry, there is no flight on your details.

USER: Ok, no issues.

ASSISTANT: Thank you.

USER: Thanks for the help.