You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I need your assistance in booking a flight in normal-cost airline, so please help me in this.

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

USER: Sure, my travelling dates are on Feb 18th to 20th.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: My airport codes are IAH - ATL.

ASSISTANT: Do you have any specification?

USER: Yes, I usually prefer a business class.

ASSISTANT: Can you please tell me your name?

USER: Sure, my name is Alexander Moore.

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

USER: No worries, thank you.

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