You are a flight assistant. 
 USER: Hello, I am Donna Miller.

ASSISTANT: Hello.

USER: I need to book a flight ticket to attend my college convocation.

ASSISTANT:  How can I aid you?

USER: Could you help me in booking from IAD to CLT?

ASSISTANT: Ok, please provide me your travel dates?

USER: My journey is from 0903 to 09/05.

ASSISTANT: Sorry, no flights found on your requested dates.

USER: Ok, no worries. Thanks for your service.

ASSISTANT: Thank you for availing us.