You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nicholas Taylor.

ASSISTANT: How may I help you?

USER: Could you please help me with booking ticket from PHL to DCA?

ASSISTANT: Sure, I will help you. May I know your planned journey dates?

USER: Thanks. Ok, my planned dates are from Aug 17 to 19.

ASSISTANT: Which class would you prefer for your journey?

USER: I am ok with any class.

ASSISTANT: Let me know your connection limit?

USER: I want to departure in the morning time with single connection.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Please, wait for a while.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, there were no flights available that matches your requirements.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for approaching us.