Hello.
user
Hello, how may I serve you now?
assistant
I am Eric Walker, I plan to celebrate my birthday with my friend at his place at Oakland.
user
Ok.
assistant
Can you help me to book flight on 12/10 and return ticket on 12/12?
user
Sure. Can I have your airport codes?
assistant
I will travel from NC-CLT to CA-OAK.
user
Sorry, there are no flights with your requirements.
assistant
Ok, thank you for the information.
user
Thank you for picking us.
assistant