You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am looking to book a flight ticket from AUS to DCA. Can you help me in booking a flight ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: Yes, I want to travel in these dates: 10/16 and 10/18.

ASSISTANT: Sorry, no flight's found based on your journey dates.

USER: It's ok, no issues.

ASSISTANT: Can I know your name for the documentation purpose?

USER: Sure, I am Timothy Martin.

ASSISTANT: Thank you for approaching us.

USER: Welcome.