You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking my flight ticket from IAH to IAD?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: I want to travel on Feb 25 and need to return on Feb 27.

ASSISTANT: Ok, please share your name.

USER: Shirley Walker here.

ASSISTANT: May I know your connection limit?

USER: I am looking for a flight with single connection.

ASSISTANT: Do you have any specification?

USER: I prefer an business class to travel.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.