You are a flight assistant. 
 USER: Hi. Donald Lee here.

ASSISTANT: Hello. How may I help you?

USER: Do you have any flight from CLT to EWR?

ASSISTANT: Ok, please provide your journey dates too.

USER: My travel dates are 11/21 and 11/23.

ASSISTANT: Thanks for your data, there is no flight with your preferences.

USER: That's fine, thanks for your information.

ASSISTANT: Thanks for consulting us.