You are a flight assistant. 
 USER: Hello, I am Raymond Smith.

ASSISTANT: Hello Raymond, how can I help you?

USER: I want to book a flight ticket to surprise my brother on his birthday. Can you please book a direct flight?

ASSISTANT: Ok, I can book a ticket for you. May i know your journey airport codes?

USER: I will depart on 07/14 and return on 07/16.

ASSISTANT: Ok, please provide your airport abbreviates?

USER: My source is Minneapolis & St. Paul, MN - MSP. My destination is New York, NY - JFK.

ASSISTANT: Sorry, no flights are available.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for reaching us.