You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: I am Jacob King, can you please book a flight from Washington, IAD?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: May I know your depart and arrival dates?

USER: I prefer to travel on 11/25 to 11/27.

ASSISTANT: Do you need a halt in between your journey?

USER: I need to halt.

ASSISTANT: Help me with your landing point.

USER: To attend the film festival, I will go to Dallas, DFW.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Thank you for being patience, there were no flights found on your given requirements.

USER: Ok, thank you.

ASSISTANT: Thank you.