You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you please reserve a flight ticket to CLT on 07/27 to guide my students for completing their final year project. Could you help me?

ASSISTANT: Sure, may I know the trip dates?

USER: I am staying in CLT and might be returns on 07/29.

ASSISTANT: Fine, just hold on.

USER: Sure.

ASSISTANT: May I know your good name?

USER: My name is Justin Lopez.

ASSISTANT: No flights are available on those dates, Justin.

USER: Ok, I will to prefer to go on my own, thank you for searching and helping to me.

ASSISTANT: Thank you for choosing us.