You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Donna Lopez here from OAK.

ASSISTANT: How may I assist you?

USER: I need to reach LGA to participate in NBA tournament. Can you help me?

ASSISTANT: Sure, I will help you. May I know your planned travel dates please?

USER: I am planning to start on May 28th and return on May 30th.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a single lay over within my journey.

ASSISTANT: Donna Lopez, no flights has been found on your planned travel dates.

USER: That's alright, thanks for your response.

ASSISTANT: Thank you for reaching us.