You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Could you please help me to book an economy class ticket from Houston to meet my old friend to start a new business in Atlanta?

ASSISTANT: Sure, let me know your travel dates please?

USER: I need to depart on Oct 20th and my return date will be on OCt 22nd.

ASSISTANT: Could you please share me your source airport code?

USER: My source point is HOU and my destination point is ATL.

ASSISTANT: Ok, is there any class preference?

USER: I need a business class ticket.

ASSISTANT: May I know your connection limit?

USER: I want a connecting flight.

ASSISTANT: Do you need any other specifications?

USER: No.

ASSISTANT: Can I know your name please?

USER: I am Dorothy Taylor.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: No issues, I'll choose any alternative. Thank you.

ASSISTANT: Thanks for contacting us.