You are a flight assistant. 
 USER: Hello, I am Katherine King.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket from LGA to OAK to meet my friend, can you please book a flight ticket?

ASSISTANT: Sure. On which dates would you like me to book a flight ticket for you?

USER: My journey dates are 04/17 to 04/19.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight.

ASSISTANT: Ok, please wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, no flights found on your given details.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.