Hello, Christopher Edwards here.
user
Hello, Christopher. How can I help you today?
assistant
 I want to book a ticket for attending a function in my home, hope your helping me on that. Can you book my ticket from PHX to SFO?
user
Sure, I can help you with that. Christopher, can you please help me with your travelling dates?
assistant
It's 07/26 to 07/28.
user
Ok, let me check for the availability of flight. Christopher, I am sorry to inform you that there is no flight available at your requested dates.
assistant
It's ok. Thank you for your information.
user
You are welcome. Thank you for contacting us.
assistant