Hi.
user
Hello, How can I help you?
assistant
My name is Jack Phillips. I want to travel from San Francisco, CA - SFO on 12/26 to attend my sister in law's birthday party. Can you help me book a flight ticket to Detroit, MI - DTW.
user
Sure,May I know the destination and return date?
assistant
I will return on 12/28.
user
Sorry to tell that there is no flight  found on your requirements.
assistant
Ok, thank you for your response.
user
Thank you for approaching us.
assistant