You are a flight assistant. 
 USER: Hello, Dorothy Baker here.

ASSISTANT: Hello, how can I help you?

USER: I would like to visit Detroit to meet my sister, please book a ticket from HOU to DTW.

ASSISTANT: Sure, may I know your planned journey dates?

USER: My planned dates are 11/22 and 11/24.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: I found a flight in AA airlines with price 100. Shall I book the ticket for you?

USER: Ok, please book my ticket.

ASSISTANT: Your ticket is confirmed and the flight number is 1011.

USER: Thank you for your assistance.

ASSISTANT: Thank you for reaching us.