You are a flight assistant. 
 USER: Hello. Donna Thomas here.

ASSISTANT: Hello, how can I help you today?

USER: I would like to travel from IAD to SEA. Could 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: Ok, when would you like to depart and return?

USER: My travelling dates will be on 10/23 to 10/25.

ASSISTANT: Ok, please wait for some time.

USER: Ok.

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

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us.