You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am George Garcia. Could you please help me with booking a direct flight?

ASSISTANT: Sure, I am here to help you in booking process.  Can you please share your travel dates?

USER: Sure, my travelling dates are Jan 26 and Jan 28.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: Ok, my travelling airport codes are CLT and ORD.

ASSISTANT: Please wait a moment.

USER: Sure.

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

USER: No problem, thank you for the information.

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