You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you today?

USER: I would like to book a direct flight from Denver to attend a client meeting in Charlotte, can you help me in booking?

ASSISTANT: Sure, I am here to help you. May I know your source and destination airport codes?

USER: My boarding and landing points are DEN and CLT.

ASSISTANT: May I know your planned travel dates?

USER: I would like to start on 02/06 and my return date will be on 02/08.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there were no flights found with your requirements.

USER: No issues, I'll choose any alternative to reach my destination. Thank you for your information.

ASSISTANT: Thank you for choosing us. May I know your name?

USER: I am Matthew Brown.

ASSISTANT: Thank you.