You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How can I help you?

USER: I am attending to Philadelphia, because I have to deliver a speech in global entrepreneur ship. So, please book a ticket with Anna Wright.

ASSISTANT: Sure, Can you provide me your travelling dates?

USER: My travelling dates are 09/23 to 09/25. There should be one connecting flight.

ASSISTANT: Please put forward your airport codes?

USER: Its from DTW to PHL.

ASSISTANT: Wait for a while I will check and revert you back.

USER: Ok.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: Unfortunately, there is no flight found with your specified data.

USER: Thank you for your information.

ASSISTANT: Thank you for reaching us.