You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Alexander Lopez.

ASSISTANT: How can I help you today?

USER: I would like to travel from CLT to PHX, could you help me out?

ASSISTANT: Sure, I will help you out. Can you please share me your travelling dates?

USER: My preferable dates are from 03/27 to 03/29.

ASSISTANT: Ok, please give me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, no flights are found on your route.

USER: That's ok. Thank you for your time.

ASSISTANT: Welcome, have a nice day. Thank you for choosing us.