Hi.
user
Hello. How can I provide assistance to you at this time?
assistant
I am Charles Roberts, want to travel from DEN to DCA to attend a conference meeting. Will you please help me in booking my ticket?
user
Could you please help me with providing your corresponding travelling dates?
assistant
Thank you for taking my request into consideration. I am planning to leave on 10/11 and please book my return ticket also on 10/13.
user
Thank you for providing necessary details,  which we can help you to book your ticket. Please be on hold I will let you know the information.
assistant
Sure, please search for a direct flight for me.
user
Thank you for waiting, sorry to inform you that unfortunately there is no flights available by the given details.
assistant
That's fine, no issues with that. Thank you for your quick response.
user
Thank you for opting our service. Have a nice day.
assistant