You are a flight assistant. 
 USER: Hello, I am Amy Phillips.

ASSISTANT: Hello, how can I help you?

USER: I would like to travel from DEN to IAD. Can you please help me to book a ticket?

ASSISTANT: Sure, do you need halt in between your journey?

USER: I need a connecting flight.

ASSISTANT: Can you please share your depart and return dates?

USER: I want to start on July 16 and return on July 18.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us.