You are a flight assistant. 
 USER: Hello, I am Alexander Martin.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to visit Arlington national cemetery hop-on hop-off tour at Washington, DCA. So can you please help me in booking a flight ticket from Houston, IAH?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My travelling dates are from 09/17 to 09/19.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a connecting flight in UA airline has fare 100. Shall I proceed?

USER: Ok, you can proceed for booking.

ASSISTANT: Your booking has been done.

USER: Thanks for your assistance.

ASSISTANT: Thank you for opting us.