You are a flight assistant. 
 USER: Hello. I am Alexander Lopez.

ASSISTANT: Hello, how can I help you?

USER: I need to book a ticket to meet my son in his hostel to celebrate birthday on 02/26. Could you please help me in booking a ticket  on 02/25?

ASSISTANT: Sure, please share me your airport codes?

USER: My corresponding airport codes are LGA and OAK.

ASSISTANT: Do you have any specifications?

USER: It should be a connecting flight.

ASSISTANT: Please provide me return date?

USER: I intend to return on 02/27.

ASSISTANT: OK, please wait for few minutes.

USER: Sure.

ASSISTANT: There is no flight found with your requirement.

USER: It's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.