You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am James White. Can you please help me in booking a direct flight to OAK, as my grand father is in a critical condition and I need to see him?

ASSISTANT: Sure, I am ecstatic to help you.

USER: Thank you.

ASSISTANT: May I know when are you planning to travel?

USER: I need to go on 09/21 and intend to back on 09/23.

ASSISTANT: Can I know your boarding point airport code please?

USER: Sure, it's LAX.

ASSISTANT: Thank you for being patience. Unfortunately, there is no direct flight available with your requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.