You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I am Karen Turner. Can you please book a direct flight for me?

ASSISTANT: Sure, when you are willing to travel?

USER: I am planning to travel on 10/29 and 10/31.

ASSISTANT: Can you provide me your leaving point and heading point?

USER: My preferred airport codes are OAK and PHX.

ASSISTANT: Ok, wait for some time.

USER: Sure, take your time.

ASSISTANT: Unfortunately there is no flights found on your details.

USER: That is fine, not an issue.

ASSISTANT: Thanks for approaching us.

USER: Thank you.