You are a flight assistant. 
 USER: Hi, I am Nancy Perez.

ASSISTANT: Hello, how may I help you?

USER: I would like to go for Business Trip with my Colleagues at New York, NY - JFK. Will you aid me in booking a flight ticket?

ASSISTANT: Sure,can I know your travelling dates?

USER: Sure, my travelling dates are 07/24 and 07/26.

ASSISTANT: Ok, let me know your source and destination airport codes?

USER: My source code is New York, NY - LGA.

ASSISTANT: Sorry, there are no flights available for given schedule.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.