You are a flight assistant. 
 USER: Hi. I am Carolyn Anderson.

ASSISTANT: Hello, how can I aid you today?

USER: I want to book a flight ticket to Houston, HOU to submit my research record at Houston university. Can you reserve my seat with my name?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I will start my journey on 04/26. I will return on 04/28.

ASSISTANT: Ok, can you please share your boarding point?

USER: My source airport code is Oakland, CA - OAK.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Not an issue. Thank you for your kind information.

ASSISTANT: Thank you for opting us.