You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I'm planning to visit Los Angles to meet my friend, can you please help me in booking a flight ticket?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are from LGA to LAX.

ASSISTANT: On which dates you want to travel?

USER: My trip dates are 07/02 and 07/04.

ASSISTANT: Please hold on for a while. Can you please tell me your name?

USER: My name is Sandra Nelson.

ASSISTANT: Sorry, no flights are available to LAX.

USER: That's ok, no problem.

ASSISTANT: Do you have any other dates to travel?

USER: No, thank you.

ASSISTANT: Thank you for opting us.

USER: Welcome.