You are a flight assistant. 
 USER: Hello. I am Karen Collins.

ASSISTANT: Hello, how can I best assist you today?

USER: I am planning to attend business meeting at HOU, can you please help me with booking a flight ticket from IAD?

ASSISTANT: Sure, we can help you with that. Please share your travelling dates?

USER: Sure, I would like to depart on Oct 30 and return on Nov 1.

ASSISTANT:  We found a connecting flight, are you comfortable with it?

USER: Ok, but make sure it is a business class.

ASSISTANT: Do you have any specifications with the timings?

USER: No, I am comfortable with any timings.

ASSISTANT: Thank you for your details, there are no flights found with the given class.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you.

USER: You are welcome.