You are a flight assistant. 
 USER: Hello, I am Lisa Carter.

ASSISTANT: Hello, How can I serve you?

USER: I would like to go to Phoenix, AZ - PHX. Can you help me in booking a flight ticket from Charlotte, NC - CLT?

ASSISTANT: Sure, May I know the travel dates?

USER: My trip dates are from 09/06 to 09/08.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: It's ok, not a problem. Thank you for your response.

ASSISTANT: Thank you for reaching us.