You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Due to lack of knowledge my brother can not book a flight ticket, so can you please help me to book his flight ticket?

ASSISTANT: Sure, I can do that for you.

USER: Thank you for your positive response.

ASSISTANT: May I know on which dates you want to travel?

USER: He had planned his journey from Aug 28 and Aug 30.

ASSISTANT: Ok, may I know the airport codes please?

USER: Ok, the nearest airports he is comfortable to departure and arrival are IAH and DTW.

ASSISTANT: Is there any other preferences that you would like to add before booking?

USER: Yes, he is comfortable with the single connecting flight.

ASSISTANT: Ok, may I know the name of your brother?

USER: Yes, his name is Samuel Brown.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: No any other preferences.

ASSISTANT: Thank you for providing your journey details, please wait a moment I'll search best flight for you.

USER: Ok, go ahead and search it.

ASSISTANT: Thank you for your time, United Airlines is providing a connecting flight and the airfare is about 100 with flight 1002. Shall I proceed?

USER: Yes, go ahead with the booking.

ASSISTANT: Sure, your ticket is booked.

USER: Thank you for your enormous help.

ASSISTANT: Thank you for reaching us, have a safe flight.