You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Michelle Johnson.

ASSISTANT: How may I be there at your service?

USER: Please book me a ticket with the fare of 500 to meet my old family.

ASSISTANT: Sure, I am gleeful to assist you. May I know your take off and landing points?

USER: It is round trip from IAH.

ASSISTANT: When are you willing to make your trip?

USER: I have planned to travel on 06/17 and 06/19.

ASSISTANT: Let me check what flights are available for you.

USER: Ok.

ASSISTANT: We found a Delta airline, flight number:1008 and the price is 100.

USER: Ok, please book this ticket.

ASSISTANT: Your flight ticket has been processed.

USER: Thank you.

ASSISTANT: Thank for approaching us.