You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you for today?

USER: I am David Parker. Can you find a flight ticket and book the ticket for me from DTW to HOU?

ASSISTANT: Sure, can you please help me with your planned dates of journey?

USER: Thank you and I have to reach that place on 04/19 and arrival back on 04/21.

ASSISTANT: Sorry Parker, there is no flights on your planned dates of journey.

USER: Sad to hear that one but no problem with that one, I can reach other agencies to book my ticket.

ASSISTANT: Ok. Thank you for reaching out here.

USER: Thank you for your help in my ticket booking.