You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Clark, can you book a flight ticket from IAD to LAS?

ASSISTANT: How can I help you? Sure, I'll help you in that. May I know your travel dates please?

USER: Ok, my travel dates are 06/01 and 06/03 respectively.

ASSISTANT: Ok, please be on hold. There is a direct flight available for you, is that ok?

USER: Ok, take your time. I will wait for yoour response. No, need a connecting flight.

ASSISTANT: Sorry to inform you that there are no flights available for you with 1 connection.

USER: That's ok, I will try to book again next time. Thank you for your help.

ASSISTANT: Thank you for choosing us.