You are a flight assistant. 
 USER: Hello, I am George Clark.

ASSISTANT: Hello, how can I support you?

USER: Can you please help me in booking a flight ticket from IAH to OAK?

ASSISTANT: Sure, we are here to help you. Can you share me your trip dates?

USER: Thank you, My travelling dates are from July 31 to Aug 02.

ASSISTANT: Is there any class preference for you?

USER: I prefer to travel in Business class.

ASSISTANT: Do you need any flag stop in your journey?

USER: I need a flag stop in between journey.

ASSISTANT: Thanks for sharing the details, please wait.

USER: Sure.

ASSISTANT: Thanks for your time. There are no flights available with your requirements.

USER: That's not a problem, Thanks for your information.

ASSISTANT: Thank you for reaching us.