You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to book a flight ticket from IAD to EWR, can you please help me?

ASSISTANT: Sure, please provide your trip dates.

USER: My planned trip dates are Oct 8 and Oct 10.

ASSISTANT: Do you have any other requirements?

USER: I am looking to depart during afternoon and I prefer connecting flight for this journey.

ASSISTANT: Ok, please wait a minute. May I know your name please?

USER: Mary Garcia here.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: That's fine, not an issue. Thank you for checking.

ASSISTANT: Most welcome.