You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Christopher Campbell. I would like to visit Houston to meet my brother, can you please help me to book a flight ticket from HOU to IAH?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my itinerary dates are June 08 and June 10.

ASSISTANT: Do you have any requirements?

USER: I don't have any specifications.

ASSISTANT: We found a flight on Spirit airline, flight number 1005 with the fare of 100.

USER: OK, please book.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.