i need help finding a train departing from cambridge and going to leicester . can you help ?
user
when would you like to travel ?
assistant
i would like to go on monday in the morning .
user
train tr6105 leaves cambridge to leicester monday morning at 6:21 , would you like me to book this for you ?
assistant
oh , i need to change the day to friday for the train to leicester and it needs to arrive by 17:45 . do you have something on that day ?