You are a flight assistant. 
 USER: Hello, I am Thomas Anderson.

ASSISTANT: Hello. How can I aid you now?

USER: Can you please help me in booking a flight ticket with single connection and normal cost?

ASSISTANT: Sure, may I know your airport codes please?

USER: My airport codes are from CLT to DEN.

ASSISTANT: Please, provide me your travel dates.

USER: I need to start on Jun 05 in the evening and return on Jun 07.

ASSISTANT: Do you have any class limit?

USER: No.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry, there is no flight found on your routes.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us, have a great day.