You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joseph Lopez.

ASSISTANT: How can I help you for today?

USER: I want to book a ticket from CLT to DTW to meet my grandparents, can you help me in booking?

ASSISTANT: Yes, I can help you. Could you tell me your dates of travelling?

USER: I am departing on 01/01 and return on 01/03.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no flight found on your requested dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.