You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Kevin Lee, I want to book a flight ticket from CLT - SEA. Aid me to book a flight ticket.

ASSISTANT: On which dates you like to travel?

USER: My travelling dates are 05/15 and 05/17.

ASSISTANT: I am sorry no flights found on your route.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Most welcome.