You are a flight assistant. 
 USER: Hello. My name is Catherine Green.

ASSISTANT: Hello, how can I aid you today?

USER: I want to book a flight ticket from SFO to JFK. Please help me in booking a flight ticket.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can you please provide your travelling dates?

USER: My preferable dates of journey are 09/02 to 09/04.

ASSISTANT: Do you prefer halt in between your journey?

USER: I need a halt in between my journey.

ASSISTANT: Do you have any other specifications?

USER: I need to travel in business class and I can afford up to 5000.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flight found with your given details.

USER: No problem, I will my alternative.

ASSISTANT: Thank you for opting us.

USER: Thanks for your information.