You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Susan Robinson here. Can you book a flight ticket for my airport codes that is from OAK to LGA?

ASSISTANT: Sure, can you please mention with your dates of journey?

USER: The travel dates for the journey are from Oct 23 to Oct 25.

ASSISTANT: Do you have any other specifications please?

USER: The return time would be in the afternoon.

ASSISTANT: Please wait for a mean while.

USER: I would prefer a economy class. Look for a connecting flight.

ASSISTANT: Sorry Susan, there is no flight found as per your travelling details.

USER: Not a problem. Thank you.

ASSISTANT: You are welcome.