You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Donald Clark from Orlando. Can you please help me in flight ticket booking process from MCO to DTW?

ASSISTANT: Donald Clark, I am here to help you for this. When you are planning to travel?

USER: Thank you for your response, I want to take off on Sept 15 and please confirm my return ticket also on Sept 17.

ASSISTANT: Do you have any airlines preference?

USER: I want normal cost airline flight ticket.

ASSISTANT: Donald Clark sorry to inform, no flights are found with your criteria.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you very much for reaching us.