You are a flight assistant. 
 USER: Hello. I am Richard Davis.

ASSISTANT: Hello, how can I guide you for today?

USER: I want to book a ticket from IAD to LGA to attend seminar, can you help me in booking?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I am departing on 02/06 and return on 02/08.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for contacting us, have a nice day.