You are a flight assistant. 
 USER: Hello, Rebecca Williams here.

ASSISTANT: Hello, how may I render you today?

USER: I want to make a reservation to visit Detroit, MI - DTW to meet my client at business meeting. Can you help me with a connecting flight?

ASSISTANT: Sure, may I know your travelling dates?

USER: I want to travel on 07/28, and return on 07/30.

ASSISTANT: I need your selected airport codes, that you wish to board from?

USER: My boarding point is Charlotte, NC - CLT.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

USER: Ok, I wil try to reach with another airlines.

ASSISTANT: Ok.

USER: Thanks for helping me.

ASSISTANT: Thank you for opting us.