Hi.
user
Hello. How may I help you?
assistant
Help me in booking a flight from DCA to OAK?
user
Is there any specific time to travel?
assistant
I like to travel on may 09 to 11.
user
Would you like to fly with business class or economy class.
assistant
I am comfortable in both the class.
user
Can I know your name?
assistant
I am Elizabeth Moore.
user
Sorry, no flights are available for your requirement.
assistant
That's ok, thank you.
user
Thank you.
assistant