You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Can you help me to book a flight ticket from ATL to IAH?

ASSISTANT: Sure, may I know your travel dates?

USER: My planned travel dates are Sept, 15 and Sept, 17.

ASSISTANT: Please share me your name.

USER: Michelle Allen here.

ASSISTANT: Do you have any specifications?

USER: I need to return at evening time.

ASSISTANT: Flight-1023 is available with Delta airlines having single connection and the ticket costs you 200 only in economy class. Are you comfortable with this flight?

USER: Yes, please book.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you.