You are a flight assistant. 
 USER: Hi. I am Ashley Roberts.

ASSISTANT: Hello, how may I help you today?

USER: I want to attend a cultural event at Charlotte, NC-CLT. Can you please book me a ticket from Dallas, TX-DFW?

ASSISTANT: Sure, can I have your dates of journey please?

USER: My journey dates are from 02/21 to 02/23.

ASSISTANT: Do you have any specifications?

USER: I want a single connection.

ASSISTANT: Please wait a moment. Sorry, there is no flights found on your given details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for choosing us.