You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Linda Green, planning to attend a party at DTW. Can you help me to book a flight?

ASSISTANT: Yes, I am glad to help you about it. Can you please provide your planned dates of journey?

USER: My planned dates are 01/28 and 01/30.

ASSISTANT: Ok, please let me know your source of journey.

USER: My source is PHL.

ASSISTANT: Sorry Green, there is no flights to your destination on your preferable dates.

USER: Ok, not a problem. Thank you for your time.

ASSISTANT: Most welcome, hope you have a great day ahead.