You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Emma Young. I want to vist NASCAR Hall of Fame, could you help me in booking the ticket?

ASSISTANT: Sure, please provide the travelling details?

USER: It's from IAD to CLT. The dates of travel are from 04/29 to 05/01.

ASSISTANT: Sorry, there are no flights available which matches with your requirements.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you, have a nice day.