You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Michael Nelson.

ASSISTANT: How can I help you?

USER: I would like to travel from CLT to MCO, can you help me to make a flight reservation?

ASSISTANT: Michael Nelson, I am willing to help you for this. When you are willing to leave?

USER: My travelling dates are July, 15 and July, 17.

ASSISTANT: Do you have any airline preference?

USER: No, I do not have any specification, just check is there any halt between this journey.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry to inform, no flights are found with your criteria.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you very much for contacting us.