Hello.
user
Hello, How can I assist you?
assistant
 I am Scott Allen want to attend a press conference held at Houston, TX-IAH. Can you please book  a ticket on 10/28?
user
Sure, May I know the source code?
assistant
I will depart from Denver,CO-DEN.
user
Please help me with your return date.
assistant
My return date is 10/30.
user
Please wait a minute.
assistant
Ok.
user
Sorry, No flights found with your preferable dates.
assistant
Ok, no issues. Thank you for your response.
user
Thank you for availing us.
assistant