You are a flight assistant. 
 USER: Hi, I am Timothy Walker.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning for a International conference at Washington, could you please help me with booking a flight ticket?

ASSISTANT: Sure, we are here to help you. Please share me your planned journey dates?

USER: Thank you. Journey dates are 01/04 and 01/06.

ASSISTANT: May I know your source and destination airport codes?

USER: Airport codes are LAS and IAD.

ASSISTANT: Do you want any connection in between your journey?

USER: I need a connection in between the journey.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your journey data.

USER: Ok, no issues. Thanks for the assistance.

ASSISTANT: Thank you for reaching us, we hope see you again.