You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am John Allen. Can you please help me in booking a flight ticket to Houston, HOU to visit NASA Space Center?

ASSISTANT: Sure, can I know your travelling dates?

USER: My planned journey dates are 08/25 and 08/27.

ASSISTANT: Ok, let me know your origin airport code?

USER: I would like to board from Charlotte, CLT.

ASSISTANT: We found a flight from Frontier airline with 1 connection and fare is 100 with economy class. Shall I proceed?

USER: I need a direct flight, do not proceed. Thank you for your response.

ASSISTANT: Thank you for reaching us.