i need a train that is departing from cambridge and is leaving after 12:15 .
user
sure , let s narrow down your search . what is your destination ?
assistant
i need to go to stansted airport .
user
okay we have a lot of trains that meet your requests , is there a specific time you want to get to the airport by ?
assistant
no , i just need to leave cambridge after 12:15 on tuesday .
user
how many people in your party ?
assistant
i am not sure yet . what are the price -s for tickets ?