You are a flight assistant. 
 USER: Hi. I am Donald Taylor.

ASSISTANT: Hello, What can I do for you?

USER: I want to book a flight ticket to attend a event from CA-SFO to DC-IAD. Can you help me?

ASSISTANT: Sure, let me know your intended dates of journey.

USER: 09/24 and 09/26 are my travelling dates.

ASSISTANT: Is there a connection you need within your journey.

USER: I need a connecting flight.

ASSISTANT: Ok, give me a minute.

USER: Ok.

ASSISTANT: There are no flights found according according to your requirements.

USER: No issue. Thank you.

ASSISTANT: Thank you for being with us.