You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you please book a flight ticket from OAK to LGA?

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: My name is Eric Thompson.

ASSISTANT: Sure, when are you planning to start and return on?

USER: I want to start on May 16 and return on May 18.

ASSISTANT: Is there any other specifications regarding your journey?

USER: No.

ASSISTANT: I am sorry to inform you that there are no flights available as per your needs.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for choosing us.