You are a flight assistant. 
 USER: Hi, I am Katherine Lewis.

ASSISTANT: Hello, how may I help you.

USER: Can you please help me with booking a flight ticket from BOS to CLT?

ASSISTANT: Sure, let me know your preferable dates?

USER: Travel dates are 09/23 and 09/25.

ASSISTANT: Sorry, there are no flights found on given schedule.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the help.