You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you?

USER: I am Ryan Nelson. Please book a flight from Oakland, OAK.

ASSISTANT: Ryan Nelson, may I know your travelling dates?

USER: I wish to travel on 01/12. I intend to recur on 01/14.

ASSISTANT: What is your destination code?

USER: New York, LGA is my landing point to meet my grandmother's 100th birthday.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights currently available for you.

USER: Ok.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: I will go with other alternative, Thank you.