You are a flight assistant. 
 USER: Hi, I am Rebecca Hall.

ASSISTANT: Hello, how can I serve you at this moment?

USER: I want to book a flight ticket on 08/05 and return on 08/07, can you help me with booking please?

ASSISTANT: Sure. Can you let me know your journey points?

USER: Yes, my airport codes are DC-IAD and FL-MCO.

ASSISTANT: Do you need any restrictions?

USER: I need a connecting flight.

ASSISTANT: Ok, please for a while.

USER: Ok.

ASSISTANT: Thanks for your presence. Unfortunately, there is no flight found on your given details.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.