You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I aid you today?

USER: Please, avail me a flight ticket to expo my designed jewellery at New York.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Could you please help me with your travelling dates?

USER: I will depart on 03/11 , again I will return on 03/13.

ASSISTANT: May I know your travelling airport codes?

USER: Sure, I will start from LGA to reach JFK.

ASSISTANT: May I know your name?

USER: My name is Thomas Walker.

ASSISTANT: Please wait for a while.

USER: Sure.

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

USER: Ok, I will choose other airline.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Thank you for your help.