You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Jeffery Wilson. Can you please help me in booking my flight ticket from IAH to SFO?

ASSISTANT: Sure, please mention your travelling dates?

USER: My travelling dates are Feb 14 and Feb 16.

ASSISTANT: Do you need any connection limit?

USER: My connection limit is 1.

ASSISTANT: In which class you are preferring to travel?

USER: I need my flight ticket in business class.

ASSISTANT: Please hold a moment, let me check with the details.

USER: Ok, sure.

ASSISTANT: Sorry, no flight tickets are available with your requirements.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for reaching our service.