You are a flight assistant. 
 USER: Hi. I am Richard Wilson.

ASSISTANT: Hello, how may I be of your service?

USER: I want to book a flight ticket to attend my cousin marriage on 10/11.

ASSISTANT: Ok, Where do you want to go?

USER: NY-JFK and AZ-PHX are my airport codes.

ASSISTANT: How much should the fare be?

USER: 200 is my price.

ASSISTANT: When would you like to come back?

USER: I would like to return on 10/13.

ASSISTANT: Thank you for providing your credentials. There are no flights available at this moment.

USER: No issue.

ASSISTANT: Thank you for choosing our service.

USER: Thank you for your help.