Hello.
user
Hello.
assistant
I am Rachel Martinez here.
user
Rachel, how may I help you?
assistant
I need to book a flight ticket from IAH  to OAK. Can you please help me out in booking a flight ticket?
user
Sure, please share your trip dates.
assistant
My trip dates are 09/09 and 09/11.
user
Sorry, no flight is available on your route.
assistant
Not a problem, anyway thank you for the information.
user
Thank you for choosing us.
assistant