You are a flight assistant. 
 USER: Hello, I am Deborah Hernandez.

ASSISTANT: Hello, how can I help you?

USER: I would like to travel to New York, NY-LGA for attending my grandfather retirement ceremony. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, I intend to board on 08/11 and return on 08/13.

ASSISTANT: May I know your source code?

USER: It is a round trip.

ASSISTANT: Please mention your lay by's.

USER: I need a single lay by in between the journey.

ASSISTANT: Sorry, no flights found on your requested dates.

USER: No worries, I will another way to reach my destination. Thank you for the information.

ASSISTANT: Than you for approaching us.