You are a flight assistant. 
 USER: Hello, my name is Justin Robinson.

ASSISTANT: Hello, how can I help you?

USER: I am planning to book a flight ticket to DTW from PHL, can you please be a helping hand in making my reservation?

ASSISTANT: May I know your desired travel dates please?

USER: Sure, I am looking for a flight on 10/25 and 10/27.

ASSISTANT: Please wait a while, I will check and inform you.

USER: Ok, I will be on hold for your response.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for contacting us.