You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Katherine Davis here.

ASSISTANT: How can I help you?

USER: I want to travel from CLT to JFK. Will you please help me in booking my ticket?

ASSISTANT: Could you please provide your travelling dates?

USER: Sure, my travelling dates are from 01/11 to 01/13.

ASSISTANT: Sorry, there is no flight available at your request.

USER: It's ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.