You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Gregory Williams.

ASSISTANT: Ok.

USER:  I am planning to attend my sister wedding at CA-LAX. Can you book a ticket from CA-OAK?

ASSISTANT: Sure, may I know when you want to travel?

USER: My travel dates are 03/29 and 03/31.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry to say no flights found with your details.

USER: Ok, no issues.

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

USER:  Thank you for your help.