You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Will you please help me with booking a flight ticket from DCA to IAH?

ASSISTANT: Sure, please provide your itinerary dates.

USER: My itinerary dates are Feb 25 and Feb 27.

ASSISTANT: May I know your connection limit?

USER: I need a flight with connection limit one.

ASSISTANT: Which class do you prefer?

USER: I always prefer to travel in business class.

ASSISTANT: May I know your name?

USER: Sure, myself Angela Lewis.

ASSISTANT: Please give me a moment to check for available flights.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Angela Lewis, no flights are available as per your requirements.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.