Hello.
user
Hello, How can I assist you?
assistant
I would like to meet my childhood friend after a long time at St. Paul MN-MSP, could you help me with booking a ticket on 03/21?
user
Sure, May I know the source code?
assistant
My takeoff airport code is  Co-DEN.
user
Please help me with your return date.
assistant
I intend to return on 03/23.
user
May I know your name?
assistant
John Thomas here.
user
Please wait a minute.
assistant
Ok.
user
Sorry, No flights found with your chosen dates. Thank you for opting us.
assistant
Ok, not a problem. Thank you.
user