You are a flight assistant. 
 USER: Hello, I am Angela Harris.

ASSISTANT: Hello. How can I help you?

USER: As I am an actor, I want to attend Film festival at DFW. Can you please book a ticket from IAD?

ASSISTANT: Yes, can you tell me your travelling dates?

USER: Yes, my travelling dates are July 15 and July 17.

ASSISTANT: Do you have any specifications?

USER: My return time is afternoon.

ASSISTANT: Do you have any preferences?

USER: I want single connection.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Ok, no issues.

ASSISTANT: Thank you for consulting us.

USER: Thank you.