Hi, Mark Thomas here.
user
Hello Mark, how may I guide you?
assistant
I want to make my flight reservation from DEN to BOS, can you please help me out?
user
Mark, could you please share me your travelling dates?
assistant
Sure, I will depart on 07/29 and return on 07/31.
user
Sure, please wait for a while.
assistant
Sure.
user
Mark, sorry no flights are available on your preferred dates.
assistant
Sad to hear that, anyway thank you for checking.
user
Thank you Mark for contacting us.
assistant