Hello,.
user
Hello, how may I help you today?
assistant
I am Helen Lewis. I am planning to go for Yosemite Adventure with my friends at Detroit, can you please book a ticket under the price 500?
user
Sure, could you please mention your travelling dates?
assistant
I want to travel on 04/11, and need to catch return flight on 04/13.
user
Ok, may I know your selected airport codes that you wish to board from and land at?
assistant
 I need to leave from my nearest airport ORD to reach DTW.
user
Sorry to say that, no flights were found on your requested dates.
assistant
Ok, no issues. Thanks for the information.
user
Thank you for choosing us.
assistant