You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Christopher Smith.

ASSISTANT: Thank you for providing your name.

USER: I want to book a flight ticket from Washington, DC - DCA for visiting Water Wall in Houston, TX - IAH.

ASSISTANT: Sure, I would like to know your travelling dates?

USER: My departure day is 11/24, return day is 11/26.

ASSISTANT: Do you need any halt in between the journey?

USER: I want direct flight.

ASSISTANT: Thank you for your details, there are no flights found with your specified connection limit.

USER: No problem, thanks for your help.

ASSISTANT: Thank you for making us to support you.